diff --git a/tools/gn2bp/Android.bp.swp b/tools/gn2bp/Android.bp.swp
new file mode 100644
index 0000000..24f22b1
--- /dev/null
+++ b/tools/gn2bp/Android.bp.swp
@@ -0,0 +1,75 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// This file is automatically generated by gen_android_bp. Do not edit.
+
+// GN: //gn:default_deps
+cc_defaults {
+    name: "cronet_aml_defaults",
+    cflags: [
+        "-O2",
+        "-Wno-error=return-type",
+        "-Wno-sign-compare",
+        "-Wno-sign-promo",
+        "-Wno-unused-parameter",
+        "-fvisibility=hidden",
+    ],
+}
+
+// GN: //third_party/android_ndk:cpu_features
+filegroup {
+    name: "cronet_aml_third_party_android_ndk_cpu_features",
+    srcs: [
+        "third_party/android_ndk/sources/android/cpufeatures/cpu-features.c",
+    ],
+}
+
+// GN: //third_party/zlib:zlib
+cc_library_static {
+    name: "cronet_aml_third_party_zlib_zlib",
+    srcs: [
+        ":cronet_aml_third_party_android_ndk_cpu_features",
+        "third_party/zlib/adler32.c",
+        "third_party/zlib/compress.c",
+        "third_party/zlib/cpu_features.c",
+        "third_party/zlib/crc32.c",
+        "third_party/zlib/deflate.c",
+        "third_party/zlib/gzclose.c",
+        "third_party/zlib/gzlib.c",
+        "third_party/zlib/gzread.c",
+        "third_party/zlib/gzwrite.c",
+        "third_party/zlib/infback.c",
+        "third_party/zlib/inffast.c",
+        "third_party/zlib/inflate.c",
+        "third_party/zlib/inftrees.c",
+        "third_party/zlib/trees.c",
+        "third_party/zlib/uncompr.c",
+        "third_party/zlib/zutil.c",
+    ],
+    defaults: [
+        "cronet_aml_defaults",
+    ],
+    cflags: [
+        "-DZLIB_DEBUG",
+        "-DZLIB_IMPLEMENTATION",
+    ],
+    local_include_dirs: [
+        "./",
+        "buildtools/third_party/libc++/",
+        "out/test/gen/",
+        "third_party/android_ndk/sources/android/cpufeatures/",
+        "third_party/zlib/",
+    ],
+}
+
diff --git a/tools/gn2bp/update_results.sh b/tools/gn2bp/update_results.sh
new file mode 100755
index 0000000..e8583ba
--- /dev/null
+++ b/tools/gn2bp/update_results.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# This script is expected to run after gen_android_bp is modified.
+#
+#   ./update_result.sh desc.json
+#
+# TARGETS contains targets which are supported by gen_android_bp and
+# this script generates Android.bp.swp from TARGETS.
+# This makes it easy to realize unintended impact/degression on
+# previously supported targets.
+
+set -eux
+
+TARGETS=(
+  "//third_party/zlib:zlib"
+)
+
+BASEDIR=$(dirname "$0")
+$BASEDIR/gen_android_bp --desc $1 --out $BASEDIR/Android.bp ${TARGETS[@]}