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

build/android/download_doclava.py

-#!/usr/bin/env python
-# 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.
-
-"""Minimal tool to download doclava from Google storage when building for
-Android."""
-
-import os
-import subprocess
-import sys
-
-
-# Its existence signifies an Android checkout.
-ANDROID_ONLY_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)),
-                                os.pardir, os.pardir,
-                                'third_party', 'android_tools')
-
-
-def main():
-  # Some Windows bots inadvertently have third_party/android_tools installed,
-  # but are unable to run download_from_google_storage because depot_tools
-  # is not in their path, so avoid failure and bail.
-  if sys.platform == 'win32':
-    return 0
-  if not os.path.exists(ANDROID_ONLY_DIR):
-    return 0
-  subprocess.check_call([
-      'download_from_google_storage',
-      '--no_resume',
-      '--no_auth',
-      '--bucket', 'chromium-doclava',
-      '--extract',
-      '-s',
-      os.path.join('src', 'buildtools', 'android', 'doclava.tar.gz.sha1')])
-  return 0
-
-if __name__ == '__main__':
-  sys.exit(main())