Add Multi-tab System Health Story

tools/perf/benchmarks/system_health.py

 # Copyright 2016 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 re
 
 from benchmarks import page_cycler_v2
 
 from core import perf_benchmark
 
@@ skipping 101 matching lines @@
   def ValueCanBeAddedPredicate(cls, value, is_first_result):
     # TODO(crbug.com/610962): Remove this stopgap when the perf dashboard
     # is able to cope with the data load generated by TBMv2 metrics.
     return not _IGNORED_STATS_RE.search(value.name)
 
 
 class DesktopMemorySystemHealth(_MemorySystemHealthBenchmark):
   """Desktop Chrome Memory System Health Benchmark."""
   PLATFORM = 'desktop'
 
+  def SetExtraBrowserOptions(self, options):
+    options.AppendExtraBrowserArgs([
+        '--enable-stats-collection-bindings'
+    ])
+
   @classmethod
   def ShouldDisable(cls, possible_browser):
     return possible_browser.platform.GetDeviceTypeName() != 'Desktop'
 
 
 @benchmark.Enabled('android')
 class MobileMemorySystemHealth(_MemorySystemHealthBenchmark):
   """Mobile Chrome Memory System Health Benchmark."""
   PLATFORM = 'mobile'
 
@@ skipping 47 matching lines @@
   and load a blank page with multiprocess enabled.
   """
 
   def SetExtraBrowserOptions(self, options):
     options.AppendExtraBrowserArgs(
         ['--webview-sandboxed-renderer'])
 
   @classmethod
   def Name(cls):
     return 'system_health.webview_startup_multiprocess'