Implement OffscreenCanvas Unaccelerated 2d commit() on main thread

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
@@ skipping 97 matching lines @@
   @classmethod
   def _CreateExpectations(cls):
     return pixel_expectations.PixelExpectations()
 
   @classmethod
   def GenerateGpuTests(cls, options):
     cls.SetParsedCommandLineOptions(options)
     name = 'Pixel'
     pages = pixel_test_pages.ES2AndES3Pages(name)
     pages += pixel_test_pages.ExperimentalCanvasFeaturesPages(name)
+    pages += pixel_test_pages.SoftwareOffscreenCanvas2dPages(name)
     if sys.platform.startswith('darwin'):
       # TOOD(kbr): replace this with CopyPagesWithNewBrowserArgsAndPrefix,
       # and removeCopyPagesWithNewBrowserArgsAndSuffix. This renaming
       # will cause all of the ES3 tests to be run back-to-back,
       # reducing the number of browser restarts and speeding up the
       # tests. Note that this will require all the ES3 tests to be
       # temporarily marked failing on macOS, and is too big a change
       # to do along with the port to the new harness.
       pages += pixel_test_pages.CopyPagesWithNewBrowserArgsAndSuffix(
         pixel_test_pages.ES2AndES3Pages(name),
@@ skipping 101 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