Added memory and V8 metrics to indexeddb_perf results

We are trying to deprecate the page_cycler.indexeddb performance test.
One of the things done by that test and not indexeddb_perf is the
measurement of V8 memory statistics. This change brings V8 stats
into indexeddb_perf - but only a subset of the full measurements.
Opted for a smaller subset as the full set has too much unrelated
stuff, and we really want to catch things like unreleased objects,
etc.

Review URL: https://codereview.chromium.org/123553003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244054 0039d316-1c4b-4281-b951-d872f2087c98

tools/perf/benchmarks/indexeddb_perf.py

@@ -23,18 +23,44 @@ Cursors:
 import json
 import os
 
+from metrics import memory
+from metrics import v8_object_stats
 from telemetry import test
 from telemetry.core import util
 from telemetry.page import page_measurement
 from telemetry.page import page_set
 
+_V8_COUNTER_NAMES = [
+    'V8.OsMemoryAllocated',
+  ]
 
 class _IndexedDbMeasurement(page_measurement.PageMeasurement):
-  def MeasurePage(self, _, tab, results):
+  def __init__(self, *args, **kwargs):
+    super(_IndexedDbMeasurement, self).__init__(*args, **kwargs)
+    self._memory_metric = None
+    self._v8_object_stats_metric = None
+
+  def DidStartBrowser(self, browser):
+    """Initialize metrics once right after the browser has been launched."""
+    self._memory_metric = memory.MemoryMetric(browser)
+    self._v8_object_stats_metric = \
+      v8_object_stats.V8ObjectStatsMetric(_V8_COUNTER_NAMES)
+
+  def DidNavigateToPage(self, page, tab):
+    self._memory_metric.Start(page, tab)
+    self._v8_object_stats_metric.Start(page, tab)
+
+  def MeasurePage(self, page, tab, results):
     tab.WaitForDocumentReadyStateToBeComplete()
     tab.WaitForJavaScriptExpression(
         'window.document.cookie.indexOf("__done=1") >= 0', 600)
 
+    self._memory_metric.Stop(page, tab)
+    self._v8_object_stats_metric.Stop(page, tab)
+
+    self._memory_metric.AddResults(tab, results)
+    self._v8_object_stats_metric.AddResults(tab, results)
+
     js_get_results = "JSON.stringify(automation.getResults());"
     result_dict = json.loads(tab.EvaluateJavaScript(js_get_results))
     total = 0.0
@@ -44,7 +70,11 @@ class _IndexedDbMeasurement(page_measurement.PageMeasurement):
       msec = float(result_dict[key])
       results.Add(key, 'ms', msec, data_type='unimportant')
       total += msec
-    results.Add('Total', 'ms', total)
+    results.Add('Total Perf', 'ms', total)
+
+  def CustomizeBrowserOptions(self, options):
+    memory.MemoryMetric.CustomizeBrowserOptions(options)
+    v8_object_stats.V8ObjectStatsMetric.CustomizeBrowserOptions(options)
 
 class IndexedDb(test.Test):
   """Chromium's IndexedDB Performance tests."""