Install sdk extras packages using android to prompt for ToS.

build/get_sdk_extras_packages.py

+#!/usr/bin/env python
+# Copyright (c) 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 json
+import os
+import sys
+
+SDK_EXTRAS_JSON_FILE = os.path.join(os.path.dirname(sys.argv[0]),
+                                    'android_sdk_extras.json')
+
+def main():
+  with open(SDK_EXTRAS_JSON_FILE) as json_file:
+    packages = json.load(json_file)
+  for package in packages:
+    print package['package'].replace('_', ' ')
+
+
+if __name__ == '__main__':
+  sys.exit(main())