Using multi-tab story in TabSwitching Benchmark

tools/perf/measurements/tab_switching.py

Index: tools/perf/measurements/tab_switching.py
diff --git a/tools/perf/measurements/tab_switching.py b/tools/perf/measurements/tab_switching.py
index dd64dfa0d2f583d17afc72b67146ef3b9351c045..b041266600820c95a18032c5b27330ecca193a8b 100644
--- a/tools/perf/measurements/tab_switching.py
+++ b/tools/perf/measurements/tab_switching.py
@@ -121,3 +121,60 @@ class TabSwitching(legacy_page_test.LegacyPageTest):
   def DidRunPage(self, platform):
     del platform  # unused
     self._power_metric.Close()
+
+class TabSwitching2(legacy_page_test.LegacyPageTest):
+  # Amount of time to measure, in seconds.
+  SAMPLE_TIME = 30
+
+  def __init__(self):
+    super(TabSwitching2, self).__init__()
+    self._power_metric = None
+    self._first_histogram = None
+
+  def CustomizeBrowserOptions(self, options):
+    keychain_metric.KeychainMetric.CustomizeBrowserOptions(options)
+
+    options.AppendExtraBrowserArgs(['--enable-stats-collection-bindings'])
+
+    # Enable background networking so we can test its impact on power usage.
+    options.disable_background_networking = False
+    power.PowerMetric.CustomizeBrowserOptions(options)
+
+  def WillStartBrowser(self, platform):
+    self._power_metric = power.PowerMetric(platform, TabSwitching.SAMPLE_TIME)
+
+  @classmethod
+  def _GetTabSwitchHistogram(cls, tab_to_switch):
+    histogram_name = 'MPArch.RWH_TabSwitchPaintDuration'
+    histogram_type = histogram_util.BROWSER_HISTOGRAM
+    return histogram_util.GetHistogram(
+        histogram_type, histogram_name, tab_to_switch)
+
+  def DidNavigateToPage(self, page, tab):
+    """record the starting histogram"""
+    self._first_histogram = self._GetTabSwitchHistogram(tab)
+
+  def ValidateAndMeasurePage(self, page, tab, results):
+    """record the ending histogram for the tab switching metric."""
+    if tab.browser.platform.CanMonitorPower():
+      self._power_metric.Start(page, tab)
+      time.sleep(TabSwitching.SAMPLE_TIME)
+      self._power_metric.Stop(page, tab)
+      self._power_metric.AddResults(tab, results,)
+
+    last_histogram = self._GetTabSwitchHistogram(tab)
+    total_diff_histogram = histogram_util.SubtractHistogram(last_histogram,
+                            self._first_histogram)
+
+    display_name = 'MPArch_RWH_TabSwitchPaintDuration'
+    results.AddSummaryValue(
+        histogram.HistogramValue(None, display_name, 'ms',
+            raw_value_json=total_diff_histogram,
+            important=False))
+
+    keychain_metric.KeychainMetric().AddResults(tab, results)
+
+  def DidRunPage(self, platform):
+    del platform  # unused
+    self._power_metric.Close()

[nednguyen, 2017/03/21 14:46:12]

Can you remove the legacy power_metric? The old power metric code is rotted &
its data are not trust-worthy, so our team is trying to get rid of it.

[vovoy, 2017/03/23 09:37:49]

Done.

+