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

tools/perf/perf_tools/memory_measurement.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.
 from perf_tools import histogram_metric
 from telemetry.page import page_measurement
 
 MEMORY_HISTOGRAMS = [
     {'name': 'V8.MemoryExternalFragmentationTotal', 'units': 'percent'},
     {'name': 'V8.MemoryHeapSampleTotalCommitted', 'units': 'kb'},
     {'name': 'V8.MemoryHeapSampleTotalUsed', 'units': 'kb'},
@@ skipping 11 matching lines @@
          for h in MEMORY_HISTOGRAMS] +
         [histogram_metric.HistogramMetric(
             h, histogram_metric.BROWSER_HISTOGRAM)
          for h in BROWSER_MEMORY_HISTOGRAMS])
 
   def DidNavigateToPage(self, page, tab):
     for h in self.histograms:
       h.Start(page, tab)
 
   def CustomizeBrowserOptions(self, options):
-    options.AppendExtraBrowserArg('--dom-automation')
+    options.AppendExtraBrowserArg('--enable-stats-collection-bindings')
     # For a hard-coded set of Google pages (such as GMail), we produce custom
     # memory histograms (V8.Something_gmail) instead of the generic histograms
     # (V8.Something), if we detect that a renderer is only rendering this page
     # and no other pages. For this test, we need to disable histogram
     # customizing, so that we get the same generic histograms produced for all
     # pages.
     options.AppendExtraBrowserArg('--disable-histogram-customizer')
     options.AppendExtraBrowserArg('--memory-metrics')
-    options.AppendExtraBrowserArg('--reduce-security-for-dom-automation-tests')
+    options.AppendExtraBrowserArg(
+        '--reduce-security-for-stats-collection-tests')
+
+    # Old commandline flags used for reference builds.
+    options.AppendExtraBrowserArg('--dom-automation')
+    options.AppendExtraBrowserArg(
+          '--reduce-security-for-dom-automation-tests')
 
   def CanRunForPage(self, page):
     return hasattr(page, 'stress_memory')
 
   def MeasurePage(self, page, tab, results):
     for h in self.histograms:
       h.GetValue(page, tab, results)
 
     if tab.browser.is_profiler_active('tcmalloc-heap'):
       # The tcmalloc_heap_profiler dumps files at regular
       # intervals (~20 secs).
       # This is a minor optimization to ensure it'll dump the last file when
       # the test completes.
       tab.ExecuteJavaScript("""
         if (chrome && chrome.memoryBenchmarking) {
           chrome.memoryBenchmarking.heapProfilerDump('final', 'renderer');
           chrome.memoryBenchmarking.heapProfilerDump('final', 'browser');
         }
       """)