[Background Sync] Use GcmNetworkManager to start the browser for sync events.

chrome/android/BUILD.gn

 # Copyright 2014 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/config.gni")
 import("//build/config/android/rules.gni")
 import("//build_overrides/v8.gni")
 import("//chrome/version.gni")
 import("//testing/test.gni")
 import("//third_party/icu/config.gni")
@@ skipping 315 matching lines @@
     "//sync/android:sync_javatests",
     "//sync:sync_java_test_support",
     "//third_party/android_tools:android_support_v7_appcompat_java",
     "//third_party/android_tools:android_support_v7_recyclerview_java",
     "//third_party/android_tools:android_support_v13_java",
     "//third_party/android_tools:legacy_http_javalib",
     "//third_party/cacheinvalidation:cacheinvalidation_javalib",
     "//third_party/jsr-305:jsr_305_javalib",
     "//ui/android:ui_java",
     "//ui/android:ui_javatests",
+    google_play_services_library,
   ]
 }
 
 # Overrides icon / name defined in chrome_java_resources.
 android_resources("chrome_public_apk_resources") {
   resource_dirs = [ "java/res_chromium" ]
 
   # Dep needed to ensure override works properly.
   deps = [
     ":chrome_java_resources",
@@ skipping 111 matching lines @@
   # TODO(GYP,cjhopman): Does this need version code/name?
   apk_name = "ChromePublicTest"
   apk_under_test = ":chrome_public_apk"
   android_manifest = chrome_public_test_apk_manifest
   deps = [
     ":chrome_public_test_apk_manifest",
     "//chrome/android:chrome_shared_test_java",
   ]
   isolate_file = "../chrome_public_test_apk.isolate"
 }