Fix worker_thread.py post change in issue 10830193

chrome/test/functional/media/worker_thread.py

 # 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.
 
 """Worker thread base class.
 
 Worker threads are used to run multiple PyUITests simultaneously. They
 synchronize calls to the browser."""
 
 import itertools
@@ skipping 122 matching lines @@
     self.__pyauto.AppendTab(pyauto.GURL(url))
 
   @synchronized
   def CallJavascriptFunc(self, fun_name, fun_args=[], url=None):
     return self.__pyauto.CallJavascriptFunc(fun_name, fun_args,
                                             tab_index=self.__FindTabLocked(url))
 
   @synchronized
   def CloseTabByURL(self, url):
     """Closes the tab with the given url."""
-    self.CloseTab(tab_index=self.__FindTabLocked(url))
+    self.__pyauto.CloseTab(tab_index=self.__FindTabLocked(url))
 
   @synchronized
   def GetDOMValue(self, name, url=None):
     return self.__pyauto.GetDOMValue(name, tab_index=self.__FindTabLocked(url))
 
   def WaitUntil(self, *args, **kwargs):
     """We do not need to lock WaitUntil since it does not call into Chrome.
 
     Ensure that the function passed in the args is thread safe.
     """
     return self.__pyauto.WaitUntil(*args, **kwargs)