Add new Telemetry tests to get CPU and memory usage for idle and flinging two test scenarios. Mirro…

chrome/test/media_router/telemetry/benchmarks/media_router_dialog_metric.py

 # Copyright 2016 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 json
 
 from telemetry.value import histogram
 from telemetry.value import histogram_util
 from telemetry.value import scalar
 
 from metrics import Metric
 
 HISTOGRAMS_TO_RECORD = [
   {
       'name': 'MediaRouter.Ui.Dialog.LoadedWithData', 'units': 'ms',
       'display_name': 'dialog_loaded_with_data',
       'type': histogram_util.BROWSER_HISTOGRAM,
       'description': 'The latency to render the media router dialog with data.',
   },
   {
       'name': 'MediaRouter.Ui.Dialog.Paint', 'units': 'ms',
       'display_name': 'dialog_paint',
       'type': histogram_util.BROWSER_HISTOGRAM,
       'description': 'The latency to paint the media router dialog.',
   }]
 
 
-class MediaRouterMetric(Metric):
+class MediaRouterDialogMetric(Metric):
   "A metric for media router dialog latency from histograms."
 
   def __init__(self):
-    super(MediaRouterMetric, self).__init__()
+    super(MediaRouterDialogMetric, self).__init__()
     self._histogram_start = dict()
     self._histogram_delta = dict()
     self._started = False
 
   def Start(self, page, tab):
     self._started = True
 
     for h in HISTOGRAMS_TO_RECORD:
       histogram_data = histogram_util.GetHistogram(
           h['type'], h['name'], tab)
@@ skipping 19 matching lines @@
   def AddResults(self, tab, results):
     assert self._histogram_delta, 'Must call Stop() first'
     for h in HISTOGRAMS_TO_RECORD:
       # Histogram data may not be available
       if h['name'] not in self._histogram_delta:
         continue
       results.AddValue(histogram.HistogramValue(
           results.current_page, h['display_name'], h['units'],
           raw_value_json=self._histogram_delta[h['name']], important=False,
           description=h.get('description')))