Re-enable media.tough_video_cases on Mac

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
 
 
 class ToughVideoCasesPage(page_module.Page):
 
   def __init__(self, url, page_set, labels=None):
     super(ToughVideoCasesPage, self).__init__(
         url=url, page_set=page_set, labels=labels)
 
   def LoopMixedAudio(self, action_runner):
     action_runner.PlayMedia(selector='#background_audio',
                             playing_event_timeout_in_seconds=60)
     action_runner.LoopMedia(loop_count=50, selector='#mixed_audio')
 
   def LoopSingleAudio(self, action_runner):
     action_runner.LoopMedia(loop_count=50, selector='#single_audio')
 
   def PlayAction(self, action_runner):
     action_runner.PlayMedia(playing_event_timeout_in_seconds=60,
                             ended_event_timeout_in_seconds=60)
 
-  def SeekBeforeAndAfterPlayhead(self, action_runner):
-    action_runner.PlayMedia(playing_event_timeout_in_seconds=60,
-                            ended_event_timeout_in_seconds=60)
-    # Wait for 1 second so that we know the play-head is at ~1s.
+  def SeekBeforeAndAfterPlayhead(self, action_runner,
+                                 action_timeout_in_seconds=60):
+    timeout = action_timeout_in_seconds
+    # Because an ended timeout is passed, this won't return until the media has
+    # played through.
+    action_runner.PlayMedia(playing_event_timeout_in_seconds=timeout,
+                            ended_event_timeout_in_seconds=timeout)
+    # Wait 1 second for no reason in particular.
     action_runner.Wait(1)
     # Seek to before the play-head location.
-    action_runner.SeekMedia(seconds=0.5, timeout_in_seconds=60,
+    action_runner.SeekMedia(seconds=0.5, timeout_in_seconds=timeout,
                             label='seek_warm')
     # Seek to after the play-head location.
-    action_runner.SeekMedia(seconds=9, timeout_in_seconds=60,
+    action_runner.SeekMedia(seconds=9, timeout_in_seconds=timeout,
                             label='seek_cold')
 
 
 class Page1(ToughVideoCasesPage):
 
   def __init__(self, page_set):
     super(Page1, self).__init__(
       url='file://tough_video_cases/video.html?src=crowd.wav&type=audio',
       page_set=page_set)
 
@@ skipping 443 matching lines @@
 
   def __init__(self, page_set):
     super(Page36, self).__init__(
       url=('file://tough_video_cases/video.html?src='
            'smpte_3840x2160_60fps_vp9.webm'),
       page_set=page_set)
 
     self.add_browser_metrics = True
 
   def RunPageInteractions(self, action_runner):
-    self.SeekBeforeAndAfterPlayhead(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)
 
     self.add_browser_metrics = True
 
@@ skipping 88 matching lines @@
     self.AddStory(Page23(self))
     self.AddStory(Page24(self))
     self.AddStory(Page25(self))
     self.AddStory(Page26(self))
     self.AddStory(Page27(self))
     self.AddStory(Page28(self))
     self.AddStory(Page29(self))
     self.AddStory(Page31(self))
     self.AddStory(Page33(self))
     self.AddStory(Page35(self))