Add encoding time and and fps to webrtc.stress case.

tools/perf/benchmarks/webrtc.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 core import perf_benchmark
 
 from measurements import webrtc
 import page_sets
 from telemetry import benchmark
 from telemetry.timeline import chrome_trace_category_filter
@@ skipping 42 matching lines @@
 @benchmark.Disabled('android')  # http://crbug.com/663802
 class WebrtcStressTest(perf_benchmark.PerfBenchmark):
   """Measures WebRtc CPU and GPU usage with multiple peer connections."""
   page_set = page_sets.WebrtcStresstestPageSet
 
   @classmethod
   def Name(cls):
     return 'webrtc.stress'
 
   def CreatePageTest(self, options):
-    return webrtc.WebRTC(use_webrtc_stats=False)
+    # Exclude all stats.
+    return webrtc.WebRTC(particular_metrics=['googAvgEncodeMs',
+                                             'googFrameRateReceived'])
 
 
 # WebrtcRendering must be a PerfBenchmark, and not a _Webrtc, because it is a
 # timeline-based.
 # Disabled on reference builds because they crash and don't support tab
 # capture. See http://crbug.com/603232.
 @benchmark.Disabled('reference')
 @benchmark.Disabled('android')  # http://crbug.com/610019
 class WebrtcRendering(perf_benchmark.PerfBenchmark):
   """Specific time measurements (e.g. fps, smoothness) for WebRtc rendering."""
 
   page_set = page_sets.WebrtcRenderingPageSet
 
   def CreateTimelineBasedMeasurementOptions(self):
     category_filter = chrome_trace_category_filter.ChromeTraceCategoryFilter(
         filter_string='webrtc,webkit.console,blink.console')
     options = timeline_based_measurement.Options(category_filter)
     options.SetLegacyTimelineBasedMetrics(
         [webrtc_rendering_timeline.WebRtcRenderingTimelineMetric()])
     return options
 
   def SetExtraBrowserOptions(self, options):
     options.AppendExtraBrowserArgs('--use-fake-device-for-media-stream')
     options.AppendExtraBrowserArgs('--use-fake-ui-for-media-stream')
 
   @classmethod
   def Name(cls):
     return 'webrtc.webrtc_smoothness'