Fixed race condition in media_stream_infobar.py.

chrome/test/functional/media_stream_infobar.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 pyauto_functional
 import pyauto
+import webrtc_test_base
 
 
-class MediaStreamInfobarTest(pyauto.PyUITest):
+class MediaStreamInfobarTest(webrtc_test_base.WebrtcTestBase):
   """Performs basic tests on the media stream infobar.
 
   This infobar is used to grant or deny access to WebRTC capabilities for a
   webpage. If a page calls the getUserMedia function the infobar will ask the
   user if it is OK for the webpage to use the webcam or microphone on the user's
   machine. These tests ensure that the infobar works as intended.
   """
 
   def ExtraChromeFlags(self):
     """Adds flags to the Chrome command line."""
@@ skipping 45 matching lines @@
   def _TestGetUserMedia(self, with_action):
     """Runs getUserMedia in the test page and returns the result."""
     url = self.GetFileURLForDataPath('webrtc', 'webrtc_jsep_test.html')
     self.NavigateToURL(url)
 
     self.assertEquals('ok-requested', self.ExecuteJavascript(
         'getUserMedia(true, true)'))
 
     self.WaitForInfobarCount(1)
     self.PerformActionOnInfobar(with_action, infobar_index=0)
+    self._WaitForGetUserMediaResult(tab_index=0)
 
-    return self.ExecuteJavascript('obtainGetUserMediaResult()')
+    return self._GetUserMediaResult(tab_index=0)
 
 
 if __name__ == '__main__':
   pyauto_functional.Main()