Re-enable all v8 benchmarks on reference

tools/perf/benchmarks/v8.py

 # Copyright 2014 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 os
 
 from core import path_util
 from core import perf_benchmark
 from page_sets import google_pages
 
 from benchmarks import v8_helper
@@ skipping 119 matching lines @@
   def ShouldDisable(cls, possible_browser):
     # This benchmark is flaky on Samsung Galaxy S5s.
     # http://crbug.com/644826
     return possible_browser.platform.GetDeviceTypeName() == 'SM-G900H'
 
   @classmethod
   def ShouldTearDownStateAfterEachStoryRun(cls):
     return True
 
 
-# Disabled on reference builds because they don't support the new
-# Tracing.requestMemoryDump DevTools API. See http://crbug.com/540022.
-@benchmark.Disabled('reference')
 class V8TodoMVCIgnition(V8TodoMVC):
   """Measures V8 Execution metrics on the TodoMVC examples using ignition."""
   page_set = page_sets.TodoMVCPageSet
 
   def SetExtraBrowserOptions(self, options):
     super(V8TodoMVCIgnition, self).SetExtraBrowserOptions(options)
     v8_helper.EnableIgnition(options)
 
   @classmethod
   def Name(cls):
     return 'v8.todomvc-ignition'
 
 
-# Disabled on reference builds because they don't support the new
-# Tracing.requestMemoryDump DevTools API. See http://crbug.com/540022.
-@benchmark.Disabled('reference')
 class V8InfiniteScroll(_InfiniteScrollBenchmark):
   """Measures V8 GC metrics and memory usage while scrolling the top web pages.
   http://www.chromium.org/developers/design-documents/rendering-benchmarks"""
 
   page_set = page_sets.InfiniteScrollPageSet
 
   @classmethod
   def Name(cls):
     return 'v8.infinite_scroll_tbmv2'
 
 
-# Disabled on reference builds because they don't support the new
-# Tracing.requestMemoryDump DevTools API. See http://crbug.com/540022.
-@benchmark.Disabled('reference')  # crbug.com/579546
 class V8InfiniteScrollIgnition(V8InfiniteScroll):
   """Measures V8 GC metrics using Ignition."""
 
   def SetExtraBrowserOptions(self, options):
     super(V8InfiniteScrollIgnition, self).SetExtraBrowserOptions(options)
     v8_helper.EnableIgnition(options)
 
   @classmethod
   def Name(cls):
     return 'v8.infinite_scroll-ignition_tbmv2'
@@ skipping 47 matching lines @@
       return True
     # http://crbug.com/623576
     if (possible_browser.platform.GetDeviceTypeName() == 'Nexus 5' or
         possible_browser.platform.GetDeviceTypeName() == 'Nexus 7'):
       return True
     return False
 
   @classmethod
   def ShouldTearDownStateAfterEachStoryRun(cls):
     return True