diff --git a/scripts/update_payload/checker.py b/scripts/update_payload/checker.py
index 56a9370..44b6811 100644
--- a/scripts/update_payload/checker.py
+++ b/scripts/update_payload/checker.py
@@ -42,7 +42,7 @@
 from update_payload import error
 from update_payload import format_utils
 from update_payload import histogram
-from update_payload import update_metadata_pb2
+import update_metadata_pb2
 
 #
 # Constants.
diff --git a/scripts/update_payload/checker_unittest.py b/scripts/update_payload/checker_unittest.py
index 993b785..cf813fd 100755
--- a/scripts/update_payload/checker_unittest.py
+++ b/scripts/update_payload/checker_unittest.py
@@ -37,7 +37,7 @@
 from update_payload import checker
 from update_payload import common
 from update_payload import test_utils
-from update_payload import update_metadata_pb2
+import update_metadata_pb2
 from update_payload.error import PayloadError
 from update_payload.payload import Payload  # Avoid name conflicts later.
 
diff --git a/scripts/update_payload/common.py b/scripts/update_payload/common.py
index 7c6ec8f..7139f6f 100644
--- a/scripts/update_payload/common.py
+++ b/scripts/update_payload/common.py
@@ -21,7 +21,7 @@
 
 import base64
 
-from update_payload import update_metadata_pb2
+import update_metadata_pb2
 from update_payload.error import PayloadError
 
 
diff --git a/scripts/update_payload/payload.py b/scripts/update_payload/payload.py
index 86caef7..aa1127d 100644
--- a/scripts/update_payload/payload.py
+++ b/scripts/update_payload/payload.py
@@ -25,10 +25,11 @@
 import struct
 import zipfile
 
+import update_metadata_pb2
+
 from update_payload import applier
 from update_payload import checker
 from update_payload import common
-from update_payload import update_metadata_pb2
 from update_payload.error import PayloadError
 
 
diff --git a/scripts/update_payload/test_utils.py b/scripts/update_payload/test_utils.py
index e153669..7005827 100644
--- a/scripts/update_payload/test_utils.py
+++ b/scripts/update_payload/test_utils.py
@@ -27,7 +27,7 @@
 
 from update_payload import common
 from update_payload import payload
-from update_payload import update_metadata_pb2
+import update_metadata_pb2
 
 
 class TestError(Exception):
diff --git a/scripts/update_payload/update_metadata_pb2.py b/scripts/update_payload/update_metadata_pb2.py
deleted file mode 100644
index b62a67a..0000000
--- a/scripts/update_payload/update_metadata_pb2.py
+++ /dev/null
@@ -1,1118 +0,0 @@
-# -*- coding: utf-8 -*-
-# Generated by the protocol buffer compiler.  DO NOT EDIT!
-# source: update_metadata.proto
-
-import sys
-_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
-from google.protobuf import descriptor as _descriptor
-from google.protobuf import message as _message
-from google.protobuf import reflection as _reflection
-from google.protobuf import symbol_database as _symbol_database
-# @@protoc_insertion_point(imports)
-
-_sym_db = _symbol_database.Default()
-
-
-
-
-DESCRIPTOR = _descriptor.FileDescriptor(
-  name='update_metadata.proto',
-  package='chromeos_update_engine',
-  syntax='proto2',
-  serialized_options=_b('H\003'),
-  serialized_pb=_b('\n\x15update_metadata.proto\x12\x16\x63hromeos_update_engine\"1\n\x06\x45xtent\x12\x13\n\x0bstart_block\x18\x01 \x01(\x04\x12\x12\n\nnum_blocks\x18\x02 \x01(\x04\"\x9f\x01\n\nSignatures\x12@\n\nsignatures\x18\x01 \x03(\x0b\x32,.chromeos_update_engine.Signatures.Signature\x1aO\n\tSignature\x12\x13\n\x07version\x18\x01 \x01(\rB\x02\x18\x01\x12\x0c\n\x04\x64\x61ta\x18\x02 \x01(\x0c\x12\x1f\n\x17unpadded_signature_size\x18\x03 \x01(\x07\"+\n\rPartitionInfo\x12\x0c\n\x04size\x18\x01 \x01(\x04\x12\x0c\n\x04hash\x18\x02 \x01(\x0c\"\x8f\x01\n\tImageInfo\x12\x11\n\x05\x62oard\x18\x01 \x01(\tB\x02\x18\x01\x12\x0f\n\x03key\x18\x02 \x01(\tB\x02\x18\x01\x12\x13\n\x07\x63hannel\x18\x03 \x01(\tB\x02\x18\x01\x12\x13\n\x07version\x18\x04 \x01(\tB\x02\x18\x01\x12\x19\n\rbuild_channel\x18\x05 \x01(\tB\x02\x18\x01\x12\x19\n\rbuild_version\x18\x06 \x01(\tB\x02\x18\x01\"\xfc\x03\n\x10InstallOperation\x12;\n\x04type\x18\x01 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\x01(\x0e\x32..chromeos_update_engine.CowMergeOperation.Type\x12\x32\n\nsrc_extent\x18\x02 \x01(\x0b\x32\x1e.chromeos_update_engine.Extent\x12\x32\n\ndst_extent\x18\x03 \x01(\x0b\x32\x1e.chromeos_update_engine.Extent\x12\x12\n\nsrc_offset\x18\x04 \x01(\r\"2\n\x04Type\x12\x0c\n\x08\x43OW_COPY\x10\x00\x12\x0b\n\x07\x43OW_XOR\x10\x01\x12\x0f\n\x0b\x43OW_REPLACE\x10\x02\"\xc8\x06\n\x0fPartitionUpdate\x12\x16\n\x0epartition_name\x18\x01 \x02(\t\x12\x17\n\x0frun_postinstall\x18\x02 \x01(\x08\x12\x18\n\x10postinstall_path\x18\x03 \x01(\t\x12\x17\n\x0f\x66ilesystem_type\x18\x04 \x01(\t\x12M\n\x17new_partition_signature\x18\x05 \x03(\x0b\x32,.chromeos_update_engine.Signatures.Signature\x12\x41\n\x12old_partition_info\x18\x06 \x01(\x0b\x32%.chromeos_update_engine.PartitionInfo\x12\x41\n\x12new_partition_info\x18\x07 \x01(\x0b\x32%.chromeos_update_engine.PartitionInfo\x12<\n\noperations\x18\x08 \x03(\x0b\x32(.chromeos_update_engine.InstallOperation\x12\x1c\n\x14postinstall_optional\x18\t \x01(\x08\x12=\n\x15hash_tree_data_extent\x18\n \x01(\x0b\x32\x1e.chromeos_update_engine.Extent\x12\x38\n\x10hash_tree_extent\x18\x0b \x01(\x0b\x32\x1e.chromeos_update_engine.Extent\x12\x1b\n\x13hash_tree_algorithm\x18\x0c \x01(\t\x12\x16\n\x0ehash_tree_salt\x18\r \x01(\x0c\x12\x37\n\x0f\x66\x65\x63_data_extent\x18\x0e \x01(\x0b\x32\x1e.chromeos_update_engine.Extent\x12\x32\n\nfec_extent\x18\x0f \x01(\x0b\x32\x1e.chromeos_update_engine.Extent\x12\x14\n\tfec_roots\x18\x10 \x01(\r:\x01\x32\x12\x0f\n\x07version\x18\x11 \x01(\t\x12\x43\n\x10merge_operations\x18\x12 \x03(\x0b\x32).chromeos_update_engine.CowMergeOperation\x12\x19\n\x11\x65stimate_cow_size\x18\x13 \x01(\x04\"L\n\x15\x44ynamicPartitionGroup\x12\x0c\n\x04name\x18\x01 \x02(\t\x12\x0c\n\x04size\x18\x02 \x01(\x04\x12\x17\n\x0fpartition_names\x18\x03 \x03(\t\"\xbe\x01\n\x18\x44ynamicPartitionMetadata\x12=\n\x06groups\x18\x01 \x03(\x0b\x32-.chromeos_update_engine.DynamicPartitionGroup\x12\x18\n\x10snapshot_enabled\x18\x02 \x01(\x08\x12\x14\n\x0cvabc_enabled\x18\x03 \x01(\x08\x12\x1e\n\x16vabc_compression_param\x18\x04 \x01(\t\x12\x13\n\x0b\x63ow_version\x18\x05 \x01(\r\"c\n\x08\x41pexInfo\x12\x14\n\x0cpackage_name\x18\x01 \x01(\t\x12\x0f\n\x07version\x18\x02 \x01(\x03\x12\x15\n\ris_compressed\x18\x03 \x01(\x08\x12\x19\n\x11\x64\x65\x63ompressed_size\x18\x04 \x01(\x03\"C\n\x0c\x41pexMetadata\x12\x33\n\tapex_info\x18\x01 \x03(\x0b\x32 .chromeos_update_engine.ApexInfo\"\x9e\x07\n\x14\x44\x65ltaArchiveManifest\x12H\n\x12install_operations\x18\x01 \x03(\x0b\x32(.chromeos_update_engine.InstallOperationB\x02\x18\x01\x12O\n\x19kernel_install_operations\x18\x02 \x03(\x0b\x32(.chromeos_update_engine.InstallOperationB\x02\x18\x01\x12\x18\n\nblock_size\x18\x03 \x01(\r:\x04\x34\x30\x39\x36\x12\x19\n\x11signatures_offset\x18\x04 \x01(\x04\x12\x17\n\x0fsignatures_size\x18\x05 \x01(\x04\x12\x42\n\x0fold_kernel_info\x18\x06 \x01(\x0b\x32%.chromeos_update_engine.PartitionInfoB\x02\x18\x01\x12\x42\n\x0fnew_kernel_info\x18\x07 \x01(\x0b\x32%.chromeos_update_engine.PartitionInfoB\x02\x18\x01\x12\x42\n\x0fold_rootfs_info\x18\x08 \x01(\x0b\x32%.chromeos_update_engine.PartitionInfoB\x02\x18\x01\x12\x42\n\x0fnew_rootfs_info\x18\t \x01(\x0b\x32%.chromeos_update_engine.PartitionInfoB\x02\x18\x01\x12=\n\x0eold_image_info\x18\n \x01(\x0b\x32!.chromeos_update_engine.ImageInfoB\x02\x18\x01\x12=\n\x0enew_image_info\x18\x0b \x01(\x0b\x32!.chromeos_update_engine.ImageInfoB\x02\x18\x01\x12\x18\n\rminor_version\x18\x0c \x01(\r:\x01\x30\x12;\n\npartitions\x18\r \x03(\x0b\x32\'.chromeos_update_engine.PartitionUpdate\x12\x15\n\rmax_timestamp\x18\x0e \x01(\x03\x12T\n\x1a\x64ynamic_partition_metadata\x18\x0f \x01(\x0b\x32\x30.chromeos_update_engine.DynamicPartitionMetadata\x12\x16\n\x0epartial_update\x18\x10 \x01(\x08\x12\x33\n\tapex_info\x18\x11 \x03(\x0b\x32 .chromeos_update_engine.ApexInfoB\x02H\x03')
-)
-
-
-
-_INSTALLOPERATION_TYPE = _descriptor.EnumDescriptor(
-  name='Type',
-  full_name='chromeos_update_engine.InstallOperation.Type',
-  filename=None,
-  file=DESCRIPTOR,
-  values=[
-    _descriptor.EnumValueDescriptor(
-      name='REPLACE', index=0, number=0,
-      serialized_options=None,
-      type=None),
-    _descriptor.EnumValueDescriptor(
-      name='REPLACE_BZ', index=1, number=1,
-      serialized_options=None,
-      type=None),
-    _descriptor.EnumValueDescriptor(
-      name='MOVE', index=2, number=2,
-      serialized_options=_b('\010\001'),
-      type=None),
-    _descriptor.EnumValueDescriptor(
-      name='BSDIFF', index=3, number=3,
-      serialized_options=_b('\010\001'),
-      type=None),
-    _descriptor.EnumValueDescriptor(
-      name='SOURCE_COPY', index=4, number=4,
-      serialized_options=None,
-      type=None),
-    _descriptor.EnumValueDescriptor(
-      name='SOURCE_BSDIFF', index=5, number=5,
-      serialized_options=None,
-      type=None),
-    _descriptor.EnumValueDescriptor(
-      name='REPLACE_XZ', index=6, number=8,
-      serialized_options=None,
-      type=None),
-    _descriptor.EnumValueDescriptor(
-      name='ZERO', index=7, number=6,
-      serialized_options=None,
-      type=None),
-    _descriptor.EnumValueDescriptor(
-      name='DISCARD', index=8, number=7,
-      serialized_options=None,
-      type=None),
-    _descriptor.EnumValueDescriptor(
-      name='BROTLI_BSDIFF', index=9, number=10,
-      serialized_options=None,
-      type=None),
-    _descriptor.EnumValueDescriptor(
-      name='PUFFDIFF', index=10, number=9,
-      serialized_options=None,
-      type=None),
-    _descriptor.EnumValueDescriptor(
-      name='ZUCCHINI', index=11, number=11,
-      serialized_options=None,
-      type=None),
-  ],
-  containing_type=None,
-  serialized_options=None,
-  serialized_start=775,
-  serialized_end=962,
-)
-_sym_db.RegisterEnumDescriptor(_INSTALLOPERATION_TYPE)
-
-_COWMERGEOPERATION_TYPE = _descriptor.EnumDescriptor(
-  name='Type',
-  full_name='chromeos_update_engine.CowMergeOperation.Type',
-  filename=None,
-  file=DESCRIPTOR,
-  values=[
-    _descriptor.EnumValueDescriptor(
-      name='COW_COPY', index=0, number=0,
-      serialized_options=None,
-      type=None),
-    _descriptor.EnumValueDescriptor(
-      name='COW_XOR', index=1, number=1,
-      serialized_options=None,
-      type=None),
-    _descriptor.EnumValueDescriptor(
-      name='COW_REPLACE', index=2, number=2,
-      serialized_options=None,
-      type=None),
-  ],
-  containing_type=None,
-  serialized_options=None,
-  serialized_start=1172,
-  serialized_end=1222,
-)
-_sym_db.RegisterEnumDescriptor(_COWMERGEOPERATION_TYPE)
-
-
-_EXTENT = _descriptor.Descriptor(
-  name='Extent',
-  full_name='chromeos_update_engine.Extent',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    _descriptor.FieldDescriptor(
-      name='start_block', full_name='chromeos_update_engine.Extent.start_block', index=0,
-      number=1, type=4, cpp_type=4, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='num_blocks', full_name='chromeos_update_engine.Extent.num_blocks', index=1,
-      number=2, type=4, cpp_type=4, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-  ],
-  extensions=[
-  ],
-  nested_types=[],
-  enum_types=[
-  ],
-  serialized_options=None,
-  is_extendable=False,
-  syntax='proto2',
-  extension_ranges=[],
-  oneofs=[
-  ],
-  serialized_start=49,
-  serialized_end=98,
-)
-
-
-_SIGNATURES_SIGNATURE = _descriptor.Descriptor(
-  name='Signature',
-  full_name='chromeos_update_engine.Signatures.Signature',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    _descriptor.FieldDescriptor(
-      name='version', full_name='chromeos_update_engine.Signatures.Signature.version', index=0,
-      number=1, type=13, cpp_type=3, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='data', full_name='chromeos_update_engine.Signatures.Signature.data', index=1,
-      number=2, type=12, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b(""),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='unpadded_signature_size', full_name='chromeos_update_engine.Signatures.Signature.unpadded_signature_size', index=2,
-      number=3, type=7, cpp_type=3, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-  ],
-  extensions=[
-  ],
-  nested_types=[],
-  enum_types=[
-  ],
-  serialized_options=None,
-  is_extendable=False,
-  syntax='proto2',
-  extension_ranges=[],
-  oneofs=[
-  ],
-  serialized_start=181,
-  serialized_end=260,
-)
-
-_SIGNATURES = _descriptor.Descriptor(
-  name='Signatures',
-  full_name='chromeos_update_engine.Signatures',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    _descriptor.FieldDescriptor(
-      name='signatures', full_name='chromeos_update_engine.Signatures.signatures', index=0,
-      number=1, type=11, cpp_type=10, label=3,
-      has_default_value=False, default_value=[],
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-  ],
-  extensions=[
-  ],
-  nested_types=[_SIGNATURES_SIGNATURE, ],
-  enum_types=[
-  ],
-  serialized_options=None,
-  is_extendable=False,
-  syntax='proto2',
-  extension_ranges=[],
-  oneofs=[
-  ],
-  serialized_start=101,
-  serialized_end=260,
-)
-
-
-_PARTITIONINFO = _descriptor.Descriptor(
-  name='PartitionInfo',
-  full_name='chromeos_update_engine.PartitionInfo',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    _descriptor.FieldDescriptor(
-      name='size', full_name='chromeos_update_engine.PartitionInfo.size', index=0,
-      number=1, type=4, cpp_type=4, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='hash', full_name='chromeos_update_engine.PartitionInfo.hash', index=1,
-      number=2, type=12, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b(""),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-  ],
-  extensions=[
-  ],
-  nested_types=[],
-  enum_types=[
-  ],
-  serialized_options=None,
-  is_extendable=False,
-  syntax='proto2',
-  extension_ranges=[],
-  oneofs=[
-  ],
-  serialized_start=262,
-  serialized_end=305,
-)
-
-
-_IMAGEINFO = _descriptor.Descriptor(
-  name='ImageInfo',
-  full_name='chromeos_update_engine.ImageInfo',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    _descriptor.FieldDescriptor(
-      name='board', full_name='chromeos_update_engine.ImageInfo.board', index=0,
-      number=1, type=9, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b("").decode('utf-8'),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='key', full_name='chromeos_update_engine.ImageInfo.key', index=1,
-      number=2, type=9, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b("").decode('utf-8'),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='channel', full_name='chromeos_update_engine.ImageInfo.channel', index=2,
-      number=3, type=9, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b("").decode('utf-8'),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='version', full_name='chromeos_update_engine.ImageInfo.version', index=3,
-      number=4, type=9, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b("").decode('utf-8'),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='build_channel', full_name='chromeos_update_engine.ImageInfo.build_channel', index=4,
-      number=5, type=9, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b("").decode('utf-8'),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='build_version', full_name='chromeos_update_engine.ImageInfo.build_version', index=5,
-      number=6, type=9, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b("").decode('utf-8'),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-  ],
-  extensions=[
-  ],
-  nested_types=[],
-  enum_types=[
-  ],
-  serialized_options=None,
-  is_extendable=False,
-  syntax='proto2',
-  extension_ranges=[],
-  oneofs=[
-  ],
-  serialized_start=308,
-  serialized_end=451,
-)
-
-
-_INSTALLOPERATION = _descriptor.Descriptor(
-  name='InstallOperation',
-  full_name='chromeos_update_engine.InstallOperation',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    _descriptor.FieldDescriptor(
-      name='type', full_name='chromeos_update_engine.InstallOperation.type', index=0,
-      number=1, type=14, cpp_type=8, label=2,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='data_offset', full_name='chromeos_update_engine.InstallOperation.data_offset', index=1,
-      number=2, type=4, cpp_type=4, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='data_length', full_name='chromeos_update_engine.InstallOperation.data_length', index=2,
-      number=3, type=4, cpp_type=4, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='src_extents', full_name='chromeos_update_engine.InstallOperation.src_extents', index=3,
-      number=4, type=11, cpp_type=10, label=3,
-      has_default_value=False, default_value=[],
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='src_length', full_name='chromeos_update_engine.InstallOperation.src_length', index=4,
-      number=5, type=4, cpp_type=4, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='dst_extents', full_name='chromeos_update_engine.InstallOperation.dst_extents', index=5,
-      number=6, type=11, cpp_type=10, label=3,
-      has_default_value=False, default_value=[],
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='dst_length', full_name='chromeos_update_engine.InstallOperation.dst_length', index=6,
-      number=7, type=4, cpp_type=4, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='data_sha256_hash', full_name='chromeos_update_engine.InstallOperation.data_sha256_hash', index=7,
-      number=8, type=12, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b(""),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='src_sha256_hash', full_name='chromeos_update_engine.InstallOperation.src_sha256_hash', index=8,
-      number=9, type=12, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b(""),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-  ],
-  extensions=[
-  ],
-  nested_types=[],
-  enum_types=[
-    _INSTALLOPERATION_TYPE,
-  ],
-  serialized_options=None,
-  is_extendable=False,
-  syntax='proto2',
-  extension_ranges=[],
-  oneofs=[
-  ],
-  serialized_start=454,
-  serialized_end=962,
-)
-
-
-_COWMERGEOPERATION = _descriptor.Descriptor(
-  name='CowMergeOperation',
-  full_name='chromeos_update_engine.CowMergeOperation',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    _descriptor.FieldDescriptor(
-      name='type', full_name='chromeos_update_engine.CowMergeOperation.type', index=0,
-      number=1, type=14, cpp_type=8, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='src_extent', full_name='chromeos_update_engine.CowMergeOperation.src_extent', index=1,
-      number=2, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='dst_extent', full_name='chromeos_update_engine.CowMergeOperation.dst_extent', index=2,
-      number=3, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='src_offset', full_name='chromeos_update_engine.CowMergeOperation.src_offset', index=3,
-      number=4, type=13, cpp_type=3, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-  ],
-  extensions=[
-  ],
-  nested_types=[],
-  enum_types=[
-    _COWMERGEOPERATION_TYPE,
-  ],
-  serialized_options=None,
-  is_extendable=False,
-  syntax='proto2',
-  extension_ranges=[],
-  oneofs=[
-  ],
-  serialized_start=965,
-  serialized_end=1222,
-)
-
-
-_PARTITIONUPDATE = _descriptor.Descriptor(
-  name='PartitionUpdate',
-  full_name='chromeos_update_engine.PartitionUpdate',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    _descriptor.FieldDescriptor(
-      name='partition_name', full_name='chromeos_update_engine.PartitionUpdate.partition_name', index=0,
-      number=1, type=9, cpp_type=9, label=2,
-      has_default_value=False, default_value=_b("").decode('utf-8'),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='run_postinstall', full_name='chromeos_update_engine.PartitionUpdate.run_postinstall', index=1,
-      number=2, type=8, cpp_type=7, label=1,
-      has_default_value=False, default_value=False,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='postinstall_path', full_name='chromeos_update_engine.PartitionUpdate.postinstall_path', index=2,
-      number=3, type=9, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b("").decode('utf-8'),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='filesystem_type', full_name='chromeos_update_engine.PartitionUpdate.filesystem_type', index=3,
-      number=4, type=9, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b("").decode('utf-8'),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='new_partition_signature', full_name='chromeos_update_engine.PartitionUpdate.new_partition_signature', index=4,
-      number=5, type=11, cpp_type=10, label=3,
-      has_default_value=False, default_value=[],
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='old_partition_info', full_name='chromeos_update_engine.PartitionUpdate.old_partition_info', index=5,
-      number=6, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='new_partition_info', full_name='chromeos_update_engine.PartitionUpdate.new_partition_info', index=6,
-      number=7, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='operations', full_name='chromeos_update_engine.PartitionUpdate.operations', index=7,
-      number=8, type=11, cpp_type=10, label=3,
-      has_default_value=False, default_value=[],
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='postinstall_optional', full_name='chromeos_update_engine.PartitionUpdate.postinstall_optional', index=8,
-      number=9, type=8, cpp_type=7, label=1,
-      has_default_value=False, default_value=False,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='hash_tree_data_extent', full_name='chromeos_update_engine.PartitionUpdate.hash_tree_data_extent', index=9,
-      number=10, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='hash_tree_extent', full_name='chromeos_update_engine.PartitionUpdate.hash_tree_extent', index=10,
-      number=11, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='hash_tree_algorithm', full_name='chromeos_update_engine.PartitionUpdate.hash_tree_algorithm', index=11,
-      number=12, type=9, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b("").decode('utf-8'),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='hash_tree_salt', full_name='chromeos_update_engine.PartitionUpdate.hash_tree_salt', index=12,
-      number=13, type=12, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b(""),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='fec_data_extent', full_name='chromeos_update_engine.PartitionUpdate.fec_data_extent', index=13,
-      number=14, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='fec_extent', full_name='chromeos_update_engine.PartitionUpdate.fec_extent', index=14,
-      number=15, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='fec_roots', full_name='chromeos_update_engine.PartitionUpdate.fec_roots', index=15,
-      number=16, type=13, cpp_type=3, label=1,
-      has_default_value=True, default_value=2,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='version', full_name='chromeos_update_engine.PartitionUpdate.version', index=16,
-      number=17, type=9, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b("").decode('utf-8'),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='merge_operations', full_name='chromeos_update_engine.PartitionUpdate.merge_operations', index=17,
-      number=18, type=11, cpp_type=10, label=3,
-      has_default_value=False, default_value=[],
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='estimate_cow_size', full_name='chromeos_update_engine.PartitionUpdate.estimate_cow_size', index=18,
-      number=19, type=4, cpp_type=4, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-  ],
-  extensions=[
-  ],
-  nested_types=[],
-  enum_types=[
-  ],
-  serialized_options=None,
-  is_extendable=False,
-  syntax='proto2',
-  extension_ranges=[],
-  oneofs=[
-  ],
-  serialized_start=1225,
-  serialized_end=2065,
-)
-
-
-_DYNAMICPARTITIONGROUP = _descriptor.Descriptor(
-  name='DynamicPartitionGroup',
-  full_name='chromeos_update_engine.DynamicPartitionGroup',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    _descriptor.FieldDescriptor(
-      name='name', full_name='chromeos_update_engine.DynamicPartitionGroup.name', index=0,
-      number=1, type=9, cpp_type=9, label=2,
-      has_default_value=False, default_value=_b("").decode('utf-8'),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='size', full_name='chromeos_update_engine.DynamicPartitionGroup.size', index=1,
-      number=2, type=4, cpp_type=4, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='partition_names', full_name='chromeos_update_engine.DynamicPartitionGroup.partition_names', index=2,
-      number=3, type=9, cpp_type=9, label=3,
-      has_default_value=False, default_value=[],
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-  ],
-  extensions=[
-  ],
-  nested_types=[],
-  enum_types=[
-  ],
-  serialized_options=None,
-  is_extendable=False,
-  syntax='proto2',
-  extension_ranges=[],
-  oneofs=[
-  ],
-  serialized_start=2067,
-  serialized_end=2143,
-)
-
-
-_DYNAMICPARTITIONMETADATA = _descriptor.Descriptor(
-  name='DynamicPartitionMetadata',
-  full_name='chromeos_update_engine.DynamicPartitionMetadata',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    _descriptor.FieldDescriptor(
-      name='groups', full_name='chromeos_update_engine.DynamicPartitionMetadata.groups', index=0,
-      number=1, type=11, cpp_type=10, label=3,
-      has_default_value=False, default_value=[],
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='snapshot_enabled', full_name='chromeos_update_engine.DynamicPartitionMetadata.snapshot_enabled', index=1,
-      number=2, type=8, cpp_type=7, label=1,
-      has_default_value=False, default_value=False,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='vabc_enabled', full_name='chromeos_update_engine.DynamicPartitionMetadata.vabc_enabled', index=2,
-      number=3, type=8, cpp_type=7, label=1,
-      has_default_value=False, default_value=False,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='vabc_compression_param', full_name='chromeos_update_engine.DynamicPartitionMetadata.vabc_compression_param', index=3,
-      number=4, type=9, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b("").decode('utf-8'),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='cow_version', full_name='chromeos_update_engine.DynamicPartitionMetadata.cow_version', index=4,
-      number=5, type=13, cpp_type=3, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-  ],
-  extensions=[
-  ],
-  nested_types=[],
-  enum_types=[
-  ],
-  serialized_options=None,
-  is_extendable=False,
-  syntax='proto2',
-  extension_ranges=[],
-  oneofs=[
-  ],
-  serialized_start=2146,
-  serialized_end=2336,
-)
-
-
-_APEXINFO = _descriptor.Descriptor(
-  name='ApexInfo',
-  full_name='chromeos_update_engine.ApexInfo',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    _descriptor.FieldDescriptor(
-      name='package_name', full_name='chromeos_update_engine.ApexInfo.package_name', index=0,
-      number=1, type=9, cpp_type=9, label=1,
-      has_default_value=False, default_value=_b("").decode('utf-8'),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='version', full_name='chromeos_update_engine.ApexInfo.version', index=1,
-      number=2, type=3, cpp_type=2, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='is_compressed', full_name='chromeos_update_engine.ApexInfo.is_compressed', index=2,
-      number=3, type=8, cpp_type=7, label=1,
-      has_default_value=False, default_value=False,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='decompressed_size', full_name='chromeos_update_engine.ApexInfo.decompressed_size', index=3,
-      number=4, type=3, cpp_type=2, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-  ],
-  extensions=[
-  ],
-  nested_types=[],
-  enum_types=[
-  ],
-  serialized_options=None,
-  is_extendable=False,
-  syntax='proto2',
-  extension_ranges=[],
-  oneofs=[
-  ],
-  serialized_start=2338,
-  serialized_end=2437,
-)
-
-
-_APEXMETADATA = _descriptor.Descriptor(
-  name='ApexMetadata',
-  full_name='chromeos_update_engine.ApexMetadata',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    _descriptor.FieldDescriptor(
-      name='apex_info', full_name='chromeos_update_engine.ApexMetadata.apex_info', index=0,
-      number=1, type=11, cpp_type=10, label=3,
-      has_default_value=False, default_value=[],
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-  ],
-  extensions=[
-  ],
-  nested_types=[],
-  enum_types=[
-  ],
-  serialized_options=None,
-  is_extendable=False,
-  syntax='proto2',
-  extension_ranges=[],
-  oneofs=[
-  ],
-  serialized_start=2439,
-  serialized_end=2506,
-)
-
-
-_DELTAARCHIVEMANIFEST = _descriptor.Descriptor(
-  name='DeltaArchiveManifest',
-  full_name='chromeos_update_engine.DeltaArchiveManifest',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    _descriptor.FieldDescriptor(
-      name='install_operations', full_name='chromeos_update_engine.DeltaArchiveManifest.install_operations', index=0,
-      number=1, type=11, cpp_type=10, label=3,
-      has_default_value=False, default_value=[],
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='kernel_install_operations', full_name='chromeos_update_engine.DeltaArchiveManifest.kernel_install_operations', index=1,
-      number=2, type=11, cpp_type=10, label=3,
-      has_default_value=False, default_value=[],
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='block_size', full_name='chromeos_update_engine.DeltaArchiveManifest.block_size', index=2,
-      number=3, type=13, cpp_type=3, label=1,
-      has_default_value=True, default_value=4096,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='signatures_offset', full_name='chromeos_update_engine.DeltaArchiveManifest.signatures_offset', index=3,
-      number=4, type=4, cpp_type=4, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='signatures_size', full_name='chromeos_update_engine.DeltaArchiveManifest.signatures_size', index=4,
-      number=5, type=4, cpp_type=4, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='old_kernel_info', full_name='chromeos_update_engine.DeltaArchiveManifest.old_kernel_info', index=5,
-      number=6, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='new_kernel_info', full_name='chromeos_update_engine.DeltaArchiveManifest.new_kernel_info', index=6,
-      number=7, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='old_rootfs_info', full_name='chromeos_update_engine.DeltaArchiveManifest.old_rootfs_info', index=7,
-      number=8, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='new_rootfs_info', full_name='chromeos_update_engine.DeltaArchiveManifest.new_rootfs_info', index=8,
-      number=9, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='old_image_info', full_name='chromeos_update_engine.DeltaArchiveManifest.old_image_info', index=9,
-      number=10, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='new_image_info', full_name='chromeos_update_engine.DeltaArchiveManifest.new_image_info', index=10,
-      number=11, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=_b('\030\001'), file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='minor_version', full_name='chromeos_update_engine.DeltaArchiveManifest.minor_version', index=11,
-      number=12, type=13, cpp_type=3, label=1,
-      has_default_value=True, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='partitions', full_name='chromeos_update_engine.DeltaArchiveManifest.partitions', index=12,
-      number=13, type=11, cpp_type=10, label=3,
-      has_default_value=False, default_value=[],
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='max_timestamp', full_name='chromeos_update_engine.DeltaArchiveManifest.max_timestamp', index=13,
-      number=14, type=3, cpp_type=2, label=1,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='dynamic_partition_metadata', full_name='chromeos_update_engine.DeltaArchiveManifest.dynamic_partition_metadata', index=14,
-      number=15, type=11, cpp_type=10, label=1,
-      has_default_value=False, default_value=None,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='partial_update', full_name='chromeos_update_engine.DeltaArchiveManifest.partial_update', index=15,
-      number=16, type=8, cpp_type=7, label=1,
-      has_default_value=False, default_value=False,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-    _descriptor.FieldDescriptor(
-      name='apex_info', full_name='chromeos_update_engine.DeltaArchiveManifest.apex_info', index=16,
-      number=17, type=11, cpp_type=10, label=3,
-      has_default_value=False, default_value=[],
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      serialized_options=None, file=DESCRIPTOR),
-  ],
-  extensions=[
-  ],
-  nested_types=[],
-  enum_types=[
-  ],
-  serialized_options=None,
-  is_extendable=False,
-  syntax='proto2',
-  extension_ranges=[],
-  oneofs=[
-  ],
-  serialized_start=2509,
-  serialized_end=3435,
-)
-
-_SIGNATURES_SIGNATURE.containing_type = _SIGNATURES
-_SIGNATURES.fields_by_name['signatures'].message_type = _SIGNATURES_SIGNATURE
-_INSTALLOPERATION.fields_by_name['type'].enum_type = _INSTALLOPERATION_TYPE
-_INSTALLOPERATION.fields_by_name['src_extents'].message_type = _EXTENT
-_INSTALLOPERATION.fields_by_name['dst_extents'].message_type = _EXTENT
-_INSTALLOPERATION_TYPE.containing_type = _INSTALLOPERATION
-_COWMERGEOPERATION.fields_by_name['type'].enum_type = _COWMERGEOPERATION_TYPE
-_COWMERGEOPERATION.fields_by_name['src_extent'].message_type = _EXTENT
-_COWMERGEOPERATION.fields_by_name['dst_extent'].message_type = _EXTENT
-_COWMERGEOPERATION_TYPE.containing_type = _COWMERGEOPERATION
-_PARTITIONUPDATE.fields_by_name['new_partition_signature'].message_type = _SIGNATURES_SIGNATURE
-_PARTITIONUPDATE.fields_by_name['old_partition_info'].message_type = _PARTITIONINFO
-_PARTITIONUPDATE.fields_by_name['new_partition_info'].message_type = _PARTITIONINFO
-_PARTITIONUPDATE.fields_by_name['operations'].message_type = _INSTALLOPERATION
-_PARTITIONUPDATE.fields_by_name['hash_tree_data_extent'].message_type = _EXTENT
-_PARTITIONUPDATE.fields_by_name['hash_tree_extent'].message_type = _EXTENT
-_PARTITIONUPDATE.fields_by_name['fec_data_extent'].message_type = _EXTENT
-_PARTITIONUPDATE.fields_by_name['fec_extent'].message_type = _EXTENT
-_PARTITIONUPDATE.fields_by_name['merge_operations'].message_type = _COWMERGEOPERATION
-_DYNAMICPARTITIONMETADATA.fields_by_name['groups'].message_type = _DYNAMICPARTITIONGROUP
-_APEXMETADATA.fields_by_name['apex_info'].message_type = _APEXINFO
-_DELTAARCHIVEMANIFEST.fields_by_name['install_operations'].message_type = _INSTALLOPERATION
-_DELTAARCHIVEMANIFEST.fields_by_name['kernel_install_operations'].message_type = _INSTALLOPERATION
-_DELTAARCHIVEMANIFEST.fields_by_name['old_kernel_info'].message_type = _PARTITIONINFO
-_DELTAARCHIVEMANIFEST.fields_by_name['new_kernel_info'].message_type = _PARTITIONINFO
-_DELTAARCHIVEMANIFEST.fields_by_name['old_rootfs_info'].message_type = _PARTITIONINFO
-_DELTAARCHIVEMANIFEST.fields_by_name['new_rootfs_info'].message_type = _PARTITIONINFO
-_DELTAARCHIVEMANIFEST.fields_by_name['old_image_info'].message_type = _IMAGEINFO
-_DELTAARCHIVEMANIFEST.fields_by_name['new_image_info'].message_type = _IMAGEINFO
-_DELTAARCHIVEMANIFEST.fields_by_name['partitions'].message_type = _PARTITIONUPDATE
-_DELTAARCHIVEMANIFEST.fields_by_name['dynamic_partition_metadata'].message_type = _DYNAMICPARTITIONMETADATA
-_DELTAARCHIVEMANIFEST.fields_by_name['apex_info'].message_type = _APEXINFO
-DESCRIPTOR.message_types_by_name['Extent'] = _EXTENT
-DESCRIPTOR.message_types_by_name['Signatures'] = _SIGNATURES
-DESCRIPTOR.message_types_by_name['PartitionInfo'] = _PARTITIONINFO
-DESCRIPTOR.message_types_by_name['ImageInfo'] = _IMAGEINFO
-DESCRIPTOR.message_types_by_name['InstallOperation'] = _INSTALLOPERATION
-DESCRIPTOR.message_types_by_name['CowMergeOperation'] = _COWMERGEOPERATION
-DESCRIPTOR.message_types_by_name['PartitionUpdate'] = _PARTITIONUPDATE
-DESCRIPTOR.message_types_by_name['DynamicPartitionGroup'] = _DYNAMICPARTITIONGROUP
-DESCRIPTOR.message_types_by_name['DynamicPartitionMetadata'] = _DYNAMICPARTITIONMETADATA
-DESCRIPTOR.message_types_by_name['ApexInfo'] = _APEXINFO
-DESCRIPTOR.message_types_by_name['ApexMetadata'] = _APEXMETADATA
-DESCRIPTOR.message_types_by_name['DeltaArchiveManifest'] = _DELTAARCHIVEMANIFEST
-_sym_db.RegisterFileDescriptor(DESCRIPTOR)
-
-Extent = _reflection.GeneratedProtocolMessageType('Extent', (_message.Message,), {
-  'DESCRIPTOR' : _EXTENT,
-  '__module__' : 'update_metadata_pb2'
-  # @@protoc_insertion_point(class_scope:chromeos_update_engine.Extent)
-  })
-_sym_db.RegisterMessage(Extent)
-
-Signatures = _reflection.GeneratedProtocolMessageType('Signatures', (_message.Message,), {
-
-  'Signature' : _reflection.GeneratedProtocolMessageType('Signature', (_message.Message,), {
-    'DESCRIPTOR' : _SIGNATURES_SIGNATURE,
-    '__module__' : 'update_metadata_pb2'
-    # @@protoc_insertion_point(class_scope:chromeos_update_engine.Signatures.Signature)
-    })
-  ,
-  'DESCRIPTOR' : _SIGNATURES,
-  '__module__' : 'update_metadata_pb2'
-  # @@protoc_insertion_point(class_scope:chromeos_update_engine.Signatures)
-  })
-_sym_db.RegisterMessage(Signatures)
-_sym_db.RegisterMessage(Signatures.Signature)
-
-PartitionInfo = _reflection.GeneratedProtocolMessageType('PartitionInfo', (_message.Message,), {
-  'DESCRIPTOR' : _PARTITIONINFO,
-  '__module__' : 'update_metadata_pb2'
-  # @@protoc_insertion_point(class_scope:chromeos_update_engine.PartitionInfo)
-  })
-_sym_db.RegisterMessage(PartitionInfo)
-
-ImageInfo = _reflection.GeneratedProtocolMessageType('ImageInfo', (_message.Message,), {
-  'DESCRIPTOR' : _IMAGEINFO,
-  '__module__' : 'update_metadata_pb2'
-  # @@protoc_insertion_point(class_scope:chromeos_update_engine.ImageInfo)
-  })
-_sym_db.RegisterMessage(ImageInfo)
-
-InstallOperation = _reflection.GeneratedProtocolMessageType('InstallOperation', (_message.Message,), {
-  'DESCRIPTOR' : _INSTALLOPERATION,
-  '__module__' : 'update_metadata_pb2'
-  # @@protoc_insertion_point(class_scope:chromeos_update_engine.InstallOperation)
-  })
-_sym_db.RegisterMessage(InstallOperation)
-
-CowMergeOperation = _reflection.GeneratedProtocolMessageType('CowMergeOperation', (_message.Message,), {
-  'DESCRIPTOR' : _COWMERGEOPERATION,
-  '__module__' : 'update_metadata_pb2'
-  # @@protoc_insertion_point(class_scope:chromeos_update_engine.CowMergeOperation)
-  })
-_sym_db.RegisterMessage(CowMergeOperation)
-
-PartitionUpdate = _reflection.GeneratedProtocolMessageType('PartitionUpdate', (_message.Message,), {
-  'DESCRIPTOR' : _PARTITIONUPDATE,
-  '__module__' : 'update_metadata_pb2'
-  # @@protoc_insertion_point(class_scope:chromeos_update_engine.PartitionUpdate)
-  })
-_sym_db.RegisterMessage(PartitionUpdate)
-
-DynamicPartitionGroup = _reflection.GeneratedProtocolMessageType('DynamicPartitionGroup', (_message.Message,), {
-  'DESCRIPTOR' : _DYNAMICPARTITIONGROUP,
-  '__module__' : 'update_metadata_pb2'
-  # @@protoc_insertion_point(class_scope:chromeos_update_engine.DynamicPartitionGroup)
-  })
-_sym_db.RegisterMessage(DynamicPartitionGroup)
-
-DynamicPartitionMetadata = _reflection.GeneratedProtocolMessageType('DynamicPartitionMetadata', (_message.Message,), {
-  'DESCRIPTOR' : _DYNAMICPARTITIONMETADATA,
-  '__module__' : 'update_metadata_pb2'
-  # @@protoc_insertion_point(class_scope:chromeos_update_engine.DynamicPartitionMetadata)
-  })
-_sym_db.RegisterMessage(DynamicPartitionMetadata)
-
-ApexInfo = _reflection.GeneratedProtocolMessageType('ApexInfo', (_message.Message,), {
-  'DESCRIPTOR' : _APEXINFO,
-  '__module__' : 'update_metadata_pb2'
-  # @@protoc_insertion_point(class_scope:chromeos_update_engine.ApexInfo)
-  })
-_sym_db.RegisterMessage(ApexInfo)
-
-ApexMetadata = _reflection.GeneratedProtocolMessageType('ApexMetadata', (_message.Message,), {
-  'DESCRIPTOR' : _APEXMETADATA,
-  '__module__' : 'update_metadata_pb2'
-  # @@protoc_insertion_point(class_scope:chromeos_update_engine.ApexMetadata)
-  })
-_sym_db.RegisterMessage(ApexMetadata)
-
-DeltaArchiveManifest = _reflection.GeneratedProtocolMessageType('DeltaArchiveManifest', (_message.Message,), {
-  'DESCRIPTOR' : _DELTAARCHIVEMANIFEST,
-  '__module__' : 'update_metadata_pb2'
-  # @@protoc_insertion_point(class_scope:chromeos_update_engine.DeltaArchiveManifest)
-  })
-_sym_db.RegisterMessage(DeltaArchiveManifest)
-
-
-DESCRIPTOR._options = None
-_SIGNATURES_SIGNATURE.fields_by_name['version']._options = None
-_IMAGEINFO.fields_by_name['board']._options = None
-_IMAGEINFO.fields_by_name['key']._options = None
-_IMAGEINFO.fields_by_name['channel']._options = None
-_IMAGEINFO.fields_by_name['version']._options = None
-_IMAGEINFO.fields_by_name['build_channel']._options = None
-_IMAGEINFO.fields_by_name['build_version']._options = None
-_INSTALLOPERATION_TYPE.values_by_name["MOVE"]._options = None
-_INSTALLOPERATION_TYPE.values_by_name["BSDIFF"]._options = None
-_DELTAARCHIVEMANIFEST.fields_by_name['install_operations']._options = None
-_DELTAARCHIVEMANIFEST.fields_by_name['kernel_install_operations']._options = None
-_DELTAARCHIVEMANIFEST.fields_by_name['old_kernel_info']._options = None
-_DELTAARCHIVEMANIFEST.fields_by_name['new_kernel_info']._options = None
-_DELTAARCHIVEMANIFEST.fields_by_name['old_rootfs_info']._options = None
-_DELTAARCHIVEMANIFEST.fields_by_name['new_rootfs_info']._options = None
-_DELTAARCHIVEMANIFEST.fields_by_name['old_image_info']._options = None
-_DELTAARCHIVEMANIFEST.fields_by_name['new_image_info']._options = None
-# @@protoc_insertion_point(module_scope)