Add memory metrics to TBMv2 media benchmarks

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 23 matching lines @@
     if tags:
       for t in tags:
         assert t in _PAGE_TAGS_LIST
     super(ToughVideoCasesPage, self).__init__(
         url=url, page_set=page_set, tags=tags)
 
   def PlayAction(self, action_runner):
     # Play the media until it has finished or it times out.
     action_runner.PlayMedia(playing_event_timeout_in_seconds=60,
                             ended_event_timeout_in_seconds=60)
+    # Generate memory dump for memoryMetric.
+    if self.page_set.measure_memory:
+      action_runner.MeasureMemory()
 
   def SeekBeforeAndAfterPlayhead(self, action_runner,
                                  action_timeout_in_seconds=60):
     timeout = action_timeout_in_seconds
     # Start the media playback.
     action_runner.PlayMedia(
         playing_event_timeout_in_seconds=timeout)
     # Wait for 1 second so that we know the play-head is at ~1s.
     action_runner.Wait(1)
     # Seek to before the play-head location.
     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=timeout,
                             label='seek_cold')
+    # Generate memory dump for memoryMetric.
+    if self.page_set.measure_memory:
+      action_runner.MeasureMemory()
 
 
 class Page2(ToughVideoCasesPage):
 
   def __init__(self, page_set):
     super(Page2, self).__init__(
       url='file://tough_video_cases/video.html?src=crowd.ogg&type=audio',
       page_set=page_set,
       tags=['vorbis', 'audio_only'])
 
@@ skipping 325 matching lines @@
   def RunPageInteractions(self, action_runner):
     self.SeekBeforeAndAfterPlayhead(action_runner,
                                     action_timeout_in_seconds=120)
 
 
 class ToughVideoCasesPageSet(story.StorySet):
   """
   Description: Video Stack Perf pages that report time_to_play, seek time and
   many other media-specific and generic metrics.
   """
-  def __init__(self):
+  def __init__(self, measure_memory=False):
     super(ToughVideoCasesPageSet, self).__init__(
             cloud_storage_bucket=story.PARTNER_BUCKET)
 
+    self.measure_memory = measure_memory
+
     # Normal play tests:
     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))
 
     # Seek tests:
     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))
     self.AddStory(Page36(self))