Download doclava when building for Android and use to build cronet Javadocs

build/android/download_doclava.py

+#!/usr/bin/env python
+# Copyright 2014 The Chromium Authors. All rights reserved.

[xunjieli, 2016/02/12 19:14:43]

nit: 2016

[pauljensen, 2016/02/12 19:20:59]

Done.

+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Minimal tool to download doclava from Google storage when building for
+Android."""
+
+import os
+import subprocess
+import sys
+
+
+def main():
+  if 'OS=android' not in os.environ.get('GYP_DEFINES', ''):
+    return 0
+  subprocess.check_call([
+      'download_from_google_storage',
+      '--no_resume',
+      '--no_auth',
+      '--bucket', 'chromium-doclava',
+      '--extract',
+      '-s', 'src/buildtools/android/doclava.tar.gz.sha1'])
+  return 0
+
+if __name__ == '__main__':
+  sys.exit(main())