Adding HTML5 track(caption) test case in PyAuto media functional tests.

chrome/test/functional/media/media_test_matrix.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 csv
 import os
 import random
 
 NOT_AVAILABLE_STRING = 'not available'
@@ skipping 180 matching lines @@
     """
     media_infos = []
     for i in range(0, len(self._video_titles)-1):
       name = self._video_titles[i]
       for sub_type in range(len(self._exts)):
         (info, url, link, tag, is_video, nickname) = (
             self._GenerateMediaInfo(sub_type, name, media_matrix_home_url))
         tag = ['audio', 'video'][is_video]
         if ((not NOT_AVAILABLE_STRING in info) and
             ((not video_only) or (video_only and is_video))):
-          media_infos.append([tag, url, nickname])
+          media_infos.append([tag, url, nickname, name])
     return media_infos
 
   @staticmethod
   def LookForMediaInfoInCompactFormByNickName(compact_list, target):
     """Look for video by its nickname in the compact_list.
 
     Args:
       compact_list: a list generated by GenerateAllMediaInfosInCompactForm.
       target: a target nickname string to look for.
 
     Returns:
       A tuple (url, nickname, tag) where nickname is a target string.
         url: URL of the video/audio.
         nickname: nickname of the video/audio for presentation
                   (such as bear.webm).
         tag: HTML5 tag for the video/audio.
     """
-    for tag, url, nickname in compact_list:
+    for tag, url, nickname, title in compact_list:
       if target == nickname:
-        return (tag, url, nickname)
+        return (tag, url, nickname, title)