DEPS: Specify WebRTC hooks and add a few dependencies

webrtc/build/google_play_services_download.py

+#!/usr/bin/env python
+# Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS.  All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+
+"""Script to download the Google Play Services SDK without its license prompt.
+
+This script needs to run after Chromium has been cloned and the link to //build
+has been created.
+"""
+
+import os
+import subprocess
+import sys
+
+
+ROOT_DIR = os.path.abspath(os.path.join(
+    os.path.dirname(os.path.abspath(__file__)), os.pardir, os.pardir))
+CR_DIR = os.path.join(ROOT_DIR, 'chromium')
+
+
+def main():
+  # Workaround to avoid license prompt for Google Play Services SDK
+  # See https://bugs.webrtc.org/5578 for more details.
+  play_services_script = os.path.join(CR_DIR, 'src', 'build', 'android',
+                                      'play_services', 'update.py')
+  if os.path.isfile(play_services_script):
+    env = os.environ.copy()
+
+    # Fake we're a buildbot to avoid the Google Play Services license prompt.
+    env['CHROME_HEADLESS'] = '1'
+    subprocess.check_call([sys.executable, play_services_script, 'download'],
+                          env=env)
+  else:
+    print 'Cannot find %s, skipping.' % play_services_script
+
+
+if __name__ == '__main__':
+  sys.exit(main())