Fix python scripts in src/chrome/

chrome/test/pyautolib/chromeos/file_browser.py

-#!/usr/bin/python
 # Copyright (c) 2011 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 simplejson as json  # found in third_party
 
 
 class FileBrowser(object):
   """This class provides an API for automating the ChromeOS File Browser.
 
@@ skipping 156 matching lines @@
 
     Returns:
       Whether file manager is initialied.
     """
     def _IsInitialized():
       script = """
         pyautoAPI.isInitialized();
       """
       return self.executor.Execute(script)
     return self._ui_test.WaitUntil(lambda: _IsInitialized())