Adding Youtube dropped frames performance measurement for different types of videos

functional/youtube.py

 #!/usr/bin/env 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 re
 import time
 
 import pyauto_functional
 import pyauto
@@ skipping 103 matching lines @@
         ytplayer.pauseVideo();
         window.domAutomationController.send('');
     """)
 
   def AssertPlayingState(self):
     """Assert player's playing state."""
     self._pyauto.assertTrue(self._pyauto.WaitUntil(self._pyauto.GetPlayerState,
         expect_retval=self._pyauto.is_playing),
         msg='Player did not enter the playing state')
 
-  def PlayVideoAndAssert(self):
-    """Start video and assert the playing state."""
+  def PlayVideoAndAssert(self, youtube_video='zuzaxlddWbk'):
+    """Start video and assert the playing state.
+    
+    By default test uses http://www.youtube.com/watch?v=zuzaxlddWbki.
+
+    Args:
+      youtube_video: The string ID of the youtube video to play.
+    """
     self._pyauto.assertTrue(self._pyauto.IsFlashPluginEnabled(), 
         msg='From here Flash plugin is disabled or not available')
-    url = self._pyauto.GetHttpURLForDataPath('media', 'youtube.html')
+    url = self._pyauto.GetHttpURLForDataPath(
+        'media', 'youtube.html?video=' + youtube_video)
     self._pyauto.NavigateToURL(url)
     self._pyauto.assertTrue(self._pyauto.WaitUntilPlayerReady(),
                             msg='Failed to load YouTube player')
     self._pyauto.PlayVideo()
     self._pyauto.AssertPlayingState()
 
 
 class YoutubeTest(pyauto.PyUITest, YoutubeTestHelper):
   """Test case for Youtube videos."""
 
@@ skipping 59 matching lines @@
         break
       loaded_bytes = self.GetVideoLoadedBytes()
       self.assertTrue(prev_loaded_bytes <= loaded_bytes)
       prev_loaded_bytes = loaded_bytes
       # Give some time to load a video
       time.sleep(1)
 
 
 if __name__ == '__main__':
   pyauto_functional.Main()