Telemetry Test for WebRTC Rendering.

tools/perf/page_sets/webrtc_rendering_measurement.py

+# Copyright 2015 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.page import page_test as page_test
+from telemetry import story
+
+WIDTH = 1280
+HEIGHT = 720
+
+class WebrtcRenderingMeasurement(page_module.Page):
+
+  def __init__(self, url, page_set):
+    super(WebrtcRenderingMeasurement, self).__init__(
+      url=url,
+      page_set=page_set,
+      name='webrtc_rendering_measurement')
+    self.webrtc_rendering_measurement = True
+
+  def RunPageInteractions(self, action_runner):
+    print "#### DEBUG running interaction ####"
+    with action_runner.CreateInteraction('Action_Create_PeerConnection',
+                                         repeatable=False):

[nednguyen, 2015/09/11 00:56:32]

Looking at the trace, I can't find Action_Create_PeerConnection event created.
Do we have any navigation that happens in the middle of this? That would blow up
the current renderer process and make the creation of interaction record fails.

[nednguyen, 2015/09/11 00:58:44]

Oh, it looks like because we have a non-stop javascript?

+      command = 'testCamera([%s, %s]);' % (WIDTH, HEIGHT)
+      action_runner.ExecuteJavaScript(command)
+      action_runner.WaitForJavaScriptCondition('testProgress')
+      errors = action_runner.EvaluateJavaScript('errors')
+      if errors:
+        raise page_test.Failure('Errors on page: ' + ', '.join(errors))
+
+class WebrtcRenderingMeasurementPageSet(story.StorySet):
+
+  """ A benchmark of webrtc rendering performance."""
+
+  def __init__(self):
+    super(WebrtcRenderingMeasurementPageSet, self).__init__()
+    self.webrtc_rendering_measurement = True
+
+    url = ('file://../../../chrome/test/data/webrtc_rendering/'
+           'loopback_peerconnection.html')
+    self.AddStory(WebrtcRenderingMeasurement(url, self))