Collect tab timing information for use in telementry-based startup tests

tools/perf/perf_tools/page_cycler.py

 # Copyright (c) 2012 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 sys
 
 from perf_tools import histogram_measurement
 from telemetry.core import util
 from telemetry.page import page_benchmark
 
 MEMORY_HISTOGRAMS = [
     {'name': 'V8.MemoryExternalFragmentationTotal', 'units': 'percent'},
     {'name': 'V8.MemoryHeapSampleTotalCommitted', 'units': 'kb'},
     {'name': 'V8.MemoryHeapSampleTotalUsed', 'units': 'kb'}]
 
 class PageCycler(page_benchmark.PageBenchmark):
   def WillNavigateToPage(self, page, tab):
     # pylint: disable=W0201
     self.histograms = [histogram_measurement.HistogramMeasurement(
                            h, histogram_measurement.RENDERER_HISTOGRAM)
                        for h in MEMORY_HISTOGRAMS]
     for h in self.histograms:
       h.Start(page, tab)
     # pylint: disable=W0201
     self.start_commit_charge = tab.browser.memory_stats['SystemCommitCharge']
 
   def CustomizeBrowserOptions(self, options):
-    options.AppendExtraBrowserArg('--dom-automation')
+    options.AppendExtraBrowserArg('--enable-stats-collection-bindings')
     options.AppendExtraBrowserArg('--js-flags=--expose_gc')
     options.AppendExtraBrowserArg('--no-sandbox')
 
   def MeasureMemory(self, tab, results):
     memory = tab.browser.memory_stats
     if not memory['Browser']:
       return
 
     metric = 'rss'
     if sys.platform == 'win32':
@@ skipping 111 matching lines @@
     self.MeasureIO(tab, results)
 
     for h in self.histograms:
       h.GetValue(page, tab, results)
 
     def _IsNavigatedToReport():
       return tab.GetCookieByName('__navigated_to_report') == '1'
     util.WaitFor(_IsNavigatedToReport, 60, poll_interval=5)
     timings = tab.EvaluateJavaScript('__get_timings()').split(',')
     results.Add('t', 'ms', [int(t) for t in timings], chart_name='times')