Add input content checking to some build scripts

build/android/dex.py

-#!/usr/bin/env python
-#
-# Copyright 2013 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 fnmatch
-import optparse
-import os
-import sys
-
-from pylib import build_utils
-
-
-def DoDex(options, paths):
-  dx_binary = os.path.join(options.android_sdk_root, 'platform-tools', 'dx')
-  dex_cmd = [dx_binary, '--dex', '--output', options.dex_path] + paths
-  build_utils.CheckCallDie(dex_cmd)
-
-
-def main(argv):
-  parser = optparse.OptionParser()
-  parser.add_option('--android-sdk-root', help='Android sdk root directory.')
-  parser.add_option('--dex-path', help='Dex output path.')
-  parser.add_option('--stamp', help='Path to touch on success.')
-
-  # TODO(newt): remove this once http://crbug.com/177552 is fixed in ninja.
-  parser.add_option('--ignore', help='Ignored.')
-
-  options, paths = parser.parse_args()
-
-  DoDex(options, paths)
-
-  if options.stamp:
-    build_utils.Touch(options.stamp)
-
-
-if __name__ == '__main__':
-  sys.exit(main(sys.argv))
-