Telemetry Test for WebRTC Rendering.

tools/telemetry/telemetry/web_perf/timeline_based_measurement.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.
 import collections
 from collections import defaultdict
 
 from telemetry.timeline import model as model_module
 from telemetry.timeline import tracing_category_filter
 from telemetry.timeline import tracing_options
 from telemetry.value import trace
 from telemetry.web_perf.metrics import timeline_based_metric
 from telemetry.web_perf.metrics import blob_timeline
+from telemetry.web_perf.metrics import webrtc_rendering_timeline
 from telemetry.web_perf.metrics import gpu_timeline
 from telemetry.web_perf.metrics import layout
 from telemetry.web_perf.metrics import memory_timeline
 from telemetry.web_perf.metrics import responsiveness_metric
 from telemetry.web_perf.metrics import smoothness
 from telemetry.web_perf.metrics import text_selection
 from telemetry.web_perf import smooth_gesture_util
 from telemetry.web_perf import story_test
 from telemetry.web_perf import timeline_interaction_record as tir_module
 
@@ skipping 15 matching lines @@
 def _GetAllTimelineBasedMetrics():
   # TODO(nednguyen): use discovery pattern to return all the instances of
   # all TimelineBasedMetrics class in web_perf/metrics/ folder.
   # This cannot be done until crbug.com/460208 is fixed.
   return (smoothness.SmoothnessMetric(),
           responsiveness_metric.ResponsivenessMetric(),
           layout.LayoutMetric(),
           gpu_timeline.GPUTimelineMetric(),
           blob_timeline.BlobTimelineMetric(),
           memory_timeline.MemoryTimelineMetric(),
-          text_selection.TextSelectionMetric())
+          text_selection.TextSelectionMetric(),
+          webrtc_rendering_timeline.WebRtcRenderingTimelineMetric())
 
 
 class InvalidInteractions(Exception):
   pass
 
 
 # TODO(nednguyen): Get rid of this results wrapper hack after we add interaction
 # record to telemetry value system (crbug.com/453109)
 class ResultsWrapperInterface(object):
   def __init__(self):
@@ skipping 224 matching lines @@
     for renderer_thread, interaction_records in (
         threads_to_records_map.iteritems()):
       meta_metrics = _TimelineBasedMetrics(
           model, renderer_thread, interaction_records,
           self._results_wrapper, self._tbm_options.GetTimelineBasedMetrics())
       meta_metrics.AddResults(results)
 
   def DidRunStoryForPageTest(self, tracing_controller):
     if tracing_controller.is_tracing_running:
       tracing_controller.Stop()