[Android] Add screenshot command line tool.

build/android/monkeyrunner_screenshot.py

-#!/usr/bin/env python
-
-# Copyright (c) 2012 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 sys
-from optparse import OptionParser
-from com.android.monkeyrunner import MonkeyRunner, MonkeyDevice
-
-def main(argv):
-  # Parse options.
-  parser = OptionParser()
-  parser.add_option("--serial", dest="serial",
-                    help="connect to device with specified SERIAL",
-                    metavar="SERIAL")
-  parser.add_option("--file", dest="filename",
-                    help="write screenshot to FILE",
-                    metavar="FILE", default="Screenshot.png")
-  parser.add_option("--timeout", dest="timeout",
-                    help="TIMEOUT in seconds for connecting to a device",
-                    metavar="TIMEOUT", default=120)
-  (options, args) = parser.parse_args(argv)
-
-  # Connect to the current device, returning a MonkeyDevice object.
-  # Monkeyrunner fails with a NullPointerException if options.serial is None.
-  if options.serial:
-    device = MonkeyRunner.waitForConnection(options.timeout, options.serial)
-  else:
-    device = MonkeyRunner.waitForConnection(options.timeout)
-
-  if not device:
-    return 1
-
-  # Grab screenshot and write to disk.
-  result = device.takeSnapshot()
-  result.writeToFile(options.filename, 'png')
-  return 0
-
-if __name__ == '__main__':
-  sys.exit(main(sys.argv))