Remove support for canvas element in tough_video_cases.

tools/perf/page_sets/tough_video_cases.py

 # Copyright 2014 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.
 from telemetry.page import page as page_module
 from telemetry import story
 
 _PAGE_TAGS_LIST = [
     # Audio codecs:
     'pcm',
     'mp3',
@@ skipping 368 matching lines @@
            'smpte_3840x2160_60fps_vp9.webm'),
       page_set=page_set,
       tags=['is_4k', 'vp9', 'video_only'])
 
     self.add_browser_metrics = True
 
   def RunPageInteractions(self, action_runner):
     self.SeekBeforeAndAfterPlayhead(action_runner,
                                     action_timeout_in_seconds=120)
 
-class Page37(ToughVideoCasesPage):
-
-  def __init__(self, page_set):
-    super(Page37, self).__init__(
-      url=('file://tough_video_cases/video.html?src=crowd1080_vp9.webm&canvas='
-           'true'),
-      page_set=page_set,
-      tags=['vp9', 'video_only'])
-
-    self.add_browser_metrics = True
-
-  def RunPageInteractions(self, action_runner):
-    self.PlayAction(action_runner)
-
-class Page38(ToughVideoCasesPage):
-
-  def __init__(self, page_set):
-    super(Page38, self).__init__(
-      url='file://tough_video_cases/video.html?src=tulip2.mp4&canvas=true',
-      page_set=page_set,
-      tags=['h264', 'aac', 'audio_video'])
-
-    self.add_browser_metrics = True
-
-  def RunPageInteractions(self, action_runner):
-    self.SeekBeforeAndAfterPlayhead(action_runner)
-
-class Page39(ToughVideoCasesPage):
-
-  def __init__(self, page_set):
-    super(Page39, self).__init__(
-      url=('file://tough_video_cases/video.html?src=garden2_10s.webm&canvas='
-           'true'),
-      page_set=page_set,
-      tags=['is_4k', 'vp8', 'vorbis', 'audio_video'])
-
-    self.add_browser_metrics = True
-
-  def RunPageInteractions(self, action_runner):
-    self.PlayAction(action_runner)
 
 class ToughVideoCasesPageSet(story.StorySet):
   """
   Description: Video Stack Perf pages that report time_to_play and many other
   media-specific and generic metrics.
   """
   def __init__(self):
     super(ToughVideoCasesPageSet, self).__init__(
             cloud_storage_bucket=story.PARTNER_BUCKET)
-    # TODO(crouleau): Pages 36 and 38 are in ToughVideoCasesPageSet even though
-    # they both report seek time instead of time_to_play.
+    # TODO(crouleau): Page 36 is in ToughVideoCasesPageSet even though
+    # it both reports seek time instead of time_to_play.
     # This may be a non-issue because we plan to merge these two page sets back
     # together and use tags to allow teams to filter which pages they want.
 
     self.AddStory(Page2(self))
     self.AddStory(Page4(self))
     self.AddStory(Page7(self))
     self.AddStory(Page8(self))
     self.AddStory(Page11(self))
     self.AddStory(Page12(self))
     self.AddStory(Page13(self))
     self.AddStory(Page14(self))
     self.AddStory(Page15(self))
     self.AddStory(Page16(self))
     self.AddStory(Page17(self))
     self.AddStory(Page30(self))
     self.AddStory(Page32(self))
     self.AddStory(Page34(self))
     self.AddStory(Page36(self))
-    self.AddStory(Page37(self))
-    self.AddStory(Page38(self))
-    self.AddStory(Page39(self))
 
 
 class ToughVideoCasesExtraPageSet(story.StorySet):
   """
   Description: Video Stack Perf pages that only report seek time.
   """
   def __init__(self):
     super(ToughVideoCasesExtraPageSet, self).__init__(
             cloud_storage_bucket=story.PARTNER_BUCKET)
 
     self.AddStory(Page19(self))
     self.AddStory(Page20(self))
     self.AddStory(Page23(self))
     self.AddStory(Page24(self))
     self.AddStory(Page25(self))
     self.AddStory(Page26(self))
     self.AddStory(Page31(self))
     self.AddStory(Page33(self))
     self.AddStory(Page35(self))