Adds four benchmarks to measure v8 runtime + GC metrics on browsing story set.

tools/perf/benchmarks/v8_browsing.py

Index: tools/perf/benchmarks/v8_browsing.py
diff --git a/tools/perf/benchmarks/v8_browsing.py b/tools/perf/benchmarks/v8_browsing.py
index 6f2f08b5f624488581d2508760fee0b13dc6659f..c972226b14dbb51c1c20981fc628a31e888f5e71 100644
--- a/tools/perf/benchmarks/v8_browsing.py
+++ b/tools/perf/benchmarks/v8_browsing.py
@@ -86,6 +86,42 @@ class _V8BrowsingBenchmark(perf_benchmark.PerfBenchmark):
     return True
 
 
+class _V8RuntimeStatsBrowsingBenchmark(perf_benchmark.PerfBenchmark):
+  """Base class for V8 browsing benchmarks that measure RuntimeStats.
+  RuntimeStats measure the time spent by v8 in different phases like
+  compile, JS execute, runtime etc.,
+  See browsing_stories._BrowsingStory for workload description.
+  """
+
+  def CreateTimelineBasedMeasurementOptions(self):
+    cat_filter = chrome_trace_category_filter.ChromeTraceCategoryFilter()
+
+    # Catagories for getting user expecations.
+    cat_filter.AddIncludedCategory('rail')
+    cat_filter.AddIncludedCategory('input')
+
+    # V8 needed categories
+    cat_filter.AddIncludedCategory('v8')
+    cat_filter.AddDisabledByDefault('disabled-by-default-v8.runtime_stats')
+
+    tbm_options = timeline_based_measurement.Options(
+        overhead_level=cat_filter)
+    tbm_options.SetTimelineBasedMetrics(['runtimeStatsTotalMetric'])

[Camillo Bruni, 2017/02/10 12:37:21]

Could you add the GC metrics as well here? (I presume this is the right place)

+    return tbm_options
+
+
+  def CreateStorySet(self, options):
+    return page_sets.SystemHealthStorySet(platform=self.PLATFORM, case='browse')
+
+  @classmethod
+  def Name(cls):
+    return 'v8.runtimestats.browsing_%s%s' % (cls.PLATFORM, cls.TEST_SUFFIX)
+
+  @classmethod
+  def ShouldTearDownStateAfterEachStoryRun(cls):
+    return True
+
+
 class _V8DesktopBrowsingBenchmark(_V8BrowsingBenchmark):
 
   @classmethod
@@ -155,4 +191,55 @@ class V8MobileTurboBrowsingBenchmark(_V8MobileBrowsingBenchmark):
   def SetExtraBrowserOptions(self, options):
     super(V8MobileTurboBrowsingBenchmark, self).SetExtraBrowserOptions(
         options)
+
+
+class _V8RuntimeStatsDesktopBrowsingBenchmark(_V8RuntimeStatsBrowsingBenchmark):
+  PLATFORM = 'desktop'
+
+  @classmethod
+  def ShouldDisable(cls, possible_browser):
+    return possible_browser.platform.GetDeviceTypeName() != 'Desktop'
+
+
+class _V8RuntimeStatsMobileBrowsingBenchmark(_V8RuntimeStatsBrowsingBenchmark):
+  PLATFORM = 'mobile'
+
+  @classmethod
+  def ShouldDisable(cls, possible_browser):
+    return possible_browser.platform.GetDeviceTypeName() == 'Desktop'
+
+
+class V8RuntimeStatsDesktopBrowsingBenchmark(
+    _V8RuntimeStatsDesktopBrowsingBenchmark):
+  TEST_SUFFIX = ''
+
+
+class V8RuntimeStatsDesktopTurboBrowsingBenchmark(
+    _V8RuntimeStatsDesktopBrowsingBenchmark):
+  TEST_SUFFIX = '_turbo'
+
+  def SetExtraBrowserOptions(self, options):
+    super(V8RuntimeStatsDesktopTurboBrowsingBenchmark,
+        self).SetExtraBrowserOptions(options)
     v8_helper.EnableTurbo(options)
+
+
+class V8RuntimeStatsMobileBrowsingBenchmark(
+    _V8RuntimeStatsMobileBrowsingBenchmark):
+  TEST_SUFFIX = ''
+
+  def SetExtraBrowserOptions(self, options):
+    super(V8RuntimeStatsMobileBrowsingBenchmark,
+        self).SetExtraBrowserOptions(options)
+    v8_helper.EnableTurbo(options)
+
+
+class V8RuntimeStatsMobileTurboBrowsingBenchmark(
+    _V8RuntimeStatsMobileBrowsingBenchmark):
+  TEST_SUFFIX = '_turbo'
+
+  def SetExtraBrowserOptions(self, options):
+    super(V8RuntimeStatsMobileTurboBrowsingBenchmark,
+        self).SetExtraBrowserOptions(options)
+    v8_helper.EnableTurbo(options)
+