Remove SWIGged use of BrowserProxy and TabProxy from PyAuto tests.

chrome/test/functional/media/worker_thread.py

Index: chrome/test/functional/media/worker_thread.py
diff --git a/chrome/test/functional/media/worker_thread.py b/chrome/test/functional/media/worker_thread.py
index 983fb2f01d914ddf0917bb0ec78dc625b86cf478..d5d76069c5b0c9dd183ec367a5955078e8041995 100644
--- a/chrome/test/functional/media/worker_thread.py
+++ b/chrome/test/functional/media/worker_thread.py
@@ -105,7 +105,7 @@ class WorkerThread(threading.Thread):
       self.AppendTab(unique_url)
       if not self.RunTask(unique_url, task):
         self.failures += 1
-      self.CloseTab(unique_url)
+      self.CloseTabByURL(unique_url)
       self.__tasks.task_done()
 
   def __FindTabLocked(self, url):
@@ -138,10 +138,9 @@ class WorkerThread(threading.Thread):
                                             tab_index=self.__FindTabLocked(url))
 
   @synchronized
-  def CloseTab(self, url):
+  def CloseTabByURL(self, url):
     """Closes the tab with the given url."""
-    return self.__pyauto.GetBrowserWindow(0).GetTab(
-        self.__FindTabLocked(url)).Close(True)
+    self.CloseTab(self.__FindTabLocked(url), 0)
 
   @synchronized
   def GetDOMValue(self, name, url=None):