Upstream: Version WebAPK runtime library

chrome/android/webapk/libs/runtime_library/BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/rules.gni")
+import("//chrome/android/webapk/libs/runtime_library_version.gni")
+
+# runtime_library_version.gni must be updated whenever the runtime library is
+# updated. The WebAPK re-extracts the runtime library from the Chrome APK when
+# |runtime_library_version| is incremented.
+
+# Whenever this constant is changed, WebApkUtils#getRuntimeDexName() must also
+# be changed.
+runtime_library_dex_asset_name = "web_apk$runtime_library_version.dex"
 
 android_aidl("webapk_service_aidl") {
   import_include = "src/org/chromium/webapk/lib/runtime_library"
   interface_file = "src/org/chromium/webapk/lib/runtime_library/common.aidl"
   sources = [
     "src/org/chromium/webapk/lib/runtime_library/IWebApkApi.aidl",
   ]
 }
 
 android_library("runtime_library") {
-  dex_path = "$target_gen_dir/web_apk.dex"
+  dex_path = "$target_gen_dir/$runtime_library_dex_asset_name"
   java_files =
       [ "src/org/chromium/webapk/lib/runtime_library/WebApkServiceImpl.java" ]
   srcjar_deps = [ ":webapk_service_aidl" ]
 }
 
 android_assets("runtime_library_assets") {
+  write_file("$target_gen_dir/web_apk_dex_version.txt", runtime_library_version)

[Xi Han, 2016/05/26 21:40:23]

Please change to webapk_dex_version.txt

+
   sources = [
-    "$target_gen_dir/web_apk.dex",
+    "$target_gen_dir/$runtime_library_dex_asset_name",
+    "$target_gen_dir/web_apk_dex_version.txt",

[Xi Han, 2016/05/26 21:40:23]

webapk_dex_version.txt

   ]
   disable_compression = true
 
   deps = [
     ":runtime_library",
   ]
 }