Start running the Mac-specific pixel test pages again.

content/test/gpu/gpu_tests/pixel_integration_test.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 glob
 import logging
 import os
 import re
+import sys
 
 from gpu_tests import cloud_storage_integration_test_base
 from gpu_tests import pixel_expectations
 from gpu_tests import pixel_test_pages
 
 from py_utils import cloud_storage
 from telemetry.util import image_util
 
 
 test_data_dir = os.path.abspath(os.path.join(
@@ skipping 89 matching lines @@
   @classmethod
   def _CreateExpectations(cls):
     return pixel_expectations.PixelExpectations()
 
   @classmethod
   def GenerateGpuTests(cls, options):
     cls.SetParsedCommandLineOptions(options)
     name = 'Pixel'
     pages = pixel_test_pages.DefaultPages(name)
     pages += pixel_test_pages.ExperimentalCanvasFeaturesPages(name)
+    if sys.platform.startswith('darwin'):
+      pages += pixel_test_pages.MacSpecificPages(name)
     for p in pages:
       yield(p.name, p.url, (p))
 
   def RunActualGpuTest(self, test_path, *args):
     page = args[0]
     # Some pixel tests require non-standard browser arguments. Need to
     # check before running each page that it can run in the current
     # browser instance.
     self.RestartBrowserIfNecessaryWithArgs(page.browser_args)
     url = self.UrlOfStaticFilePath(test_path)
@@ skipping 89 matching lines @@
       ref_png = None
 
     if ref_png is not None:
       return ref_png
 
     print ('Reference image not found. Writing tab contents as reference to: ' +
            image_path)
 
     self._WriteImage(image_path, screenshot)
     return screenshot