Telemetry Test for WebRTC Rendering.

tools/perf/benchmarks/webrtc_rendering.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.
+
+
+import re
+
+from core import perf_benchmark
+from telemetry.timeline import tracing_category_filter
+from telemetry.web_perf import timeline_based_measurement
+
+import page_sets
+
+RE_BENCHMARK_VALUES = re.compile('WebRTCRendering_')
+
+class WebRTCRendering(perf_benchmark.PerfBenchmark):
+  """Timeline based benchmark for the WebRtc rendering."""
+
+  page_set = page_sets.WebrtcRenderingMeasurementPageSet
+
+  def CreateTimelineBasedMeasurementOptions(self):
+    cc_filter = tracing_category_filter.TracingCategoryFilter(
+      filter_string='cc')

[nednguyen, 2015/09/14 21:42:32]

The bug here is that the filter string is too narrowed, hence the trace events
that represent the interaction record are suppressed.
To fix it, change this to filter_string='cc,webkit.console,blink.console'

+    return timeline_based_measurement.Options(overhead_level=cc_filter)
+
+  def CustomizeBrowserOptions(self, options):
+    import logging
+    logging.info('About to start web browser')
+    options.AppendExtraBrowserArgs('--use-fake-device-for-media-stream')
+    options.AppendExtraBrowserArgs('--use-fake-ui-for-media-stream')
+
+  @classmethod
+  def Name(cls):
+    return 'webrtc_rendering.webrtc_rendering'
+
+  @classmethod
+  def ValueCanBeAddedPredicate(cls, value, is_first_result):
+    print "value: %s" % value
+    return bool(RE_BENCHMARK_VALUES.match(value.name))