delta_generator: Use "kernel" and "root" partition names internally

This commit abandons using "boot" and "system" names internally for
major version 1 payloads in favor of "kernel" and "root", which is
symmetrical with what's used in major version 2 payloads.

BUG=chromium:794404
TEST=no errors running brillo_update_payload with FORCE_MAJOR_VERSION
  set to either 1 or 2; paycheck.py <generated payload> --check and
  printing partition names in protobuf confirms correct names are
  generated

Change-Id: I396274812d5586e19a021c05b8b7a415aac976bf
Reviewed-on: https://chromium-review.googlesource.com/1119573
Commit-Ready: Tudor Brindus <tbrindus@chromium.org>
Tested-by: Tudor Brindus <tbrindus@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
diff --git a/payload_generator/generate_delta_main.cc b/payload_generator/generate_delta_main.cc
index d5a73ef..cd08118 100644
--- a/payload_generator/generate_delta_main.cc
+++ b/payload_generator/generate_delta_main.cc
@@ -290,8 +290,8 @@
                 "Path to the .map files associated with the partition files "
                 "in the new partition, similar to the -old_mapfiles flag.");
   DEFINE_string(partition_names,
-                string(kLegacyPartitionNameRoot) + ":" +
-                kLegacyPartitionNameKernel,
+                string(kPartitionNameRoot) + ":" +
+                kPartitionNameKernel,
                 "Names of the partitions. To pass multiple names, use a single "
                 "argument with a colon between names, e.g. "
                 "name:name2:name3:last_name . Name can not be empty, and it "
@@ -447,8 +447,8 @@
     LOG_IF(FATAL, partition_names.size() != 2)
         << "To support more than 2 partitions, please use the "
         << "--new_partitions flag and major version 2.";
-    LOG_IF(FATAL, partition_names[0] != kLegacyPartitionNameRoot ||
-                  partition_names[1] != kLegacyPartitionNameKernel)
+    LOG_IF(FATAL, partition_names[0] != kPartitionNameRoot ||
+                  partition_names[1] != kPartitionNameKernel)
         << "To support non-default partition name, please use the "
         << "--new_partitions flag and major version 2.";
   }
diff --git a/payload_generator/inplace_generator.cc b/payload_generator/inplace_generator.cc
index febdcce..62608e5 100644
--- a/payload_generator/inplace_generator.cc
+++ b/payload_generator/inplace_generator.cc
@@ -802,7 +802,7 @@
                                config.hard_chunk_size / config.block_size);
   size_t soft_chunk_blocks = config.soft_chunk_size / config.block_size;
   uint64_t partition_size = new_part.size;
-  if (new_part.name == kLegacyPartitionNameRoot)
+  if (new_part.name == kPartitionNameRoot)
     partition_size = config.rootfs_partition_size;
 
   LOG(INFO) << "Delta compressing " << new_part.name << " partition...";
diff --git a/payload_generator/payload_file.cc b/payload_generator/payload_file.cc
index 941b640..a9e32a3 100644
--- a/payload_generator/payload_file.cc
+++ b/payload_generator/payload_file.cc
@@ -81,8 +81,8 @@
                                const vector<AnnotatedOperation>& aops) {
   // Check partitions order for Chrome OS
   if (major_version_ == kChromeOSMajorPayloadVersion) {
-    const vector<const char*> part_order = { kLegacyPartitionNameRoot,
-                                             kLegacyPartitionNameKernel };
+    const vector<const char*> part_order = { kPartitionNameRoot,
+                                             kPartitionNameKernel };
     TEST_AND_RETURN_FALSE(part_vec_.size() < part_order.size());
     TEST_AND_RETURN_FALSE(new_conf.name == part_order[part_vec_.size()]);
   }
@@ -152,7 +152,7 @@
         *(partition->mutable_new_partition_info()) = part.new_info;
     } else {
       // major_version_ == kChromeOSMajorPayloadVersion
-      if (part.name == kLegacyPartitionNameKernel) {
+      if (part.name == kPartitionNameKernel) {
         for (const AnnotatedOperation& aop : part.aops)
           *manifest_.add_kernel_install_operations() = aop.op;
         if (part.old_info.has_size() || part.old_info.has_hash())
diff --git a/payload_generator/payload_generation_config.cc b/payload_generator/payload_generation_config.cc
index 15d4ab5..1f65b24 100644
--- a/payload_generator/payload_generation_config.cc
+++ b/payload_generator/payload_generation_config.cc
@@ -209,7 +209,7 @@
     TEST_AND_RETURN_FALSE(part.ValidateExists());
     TEST_AND_RETURN_FALSE(part.size % block_size == 0);
     if (version.minor == kInPlaceMinorPayloadVersion &&
-        part.name == kLegacyPartitionNameRoot)
+        part.name == kPartitionNameRoot)
       TEST_AND_RETURN_FALSE(rootfs_partition_size >= part.size);
     if (version.major == kChromeOSMajorPayloadVersion)
       TEST_AND_RETURN_FALSE(part.postinstall.IsEmpty());