Make OffscreenCanvas animation in sync with its placeholder canvas's parent frame rate

content/test/gpu/gpu_tests/pixel_test_pages.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.
 
 class PixelTestPage(object):
   """A wrapper class mimicking the functionality of the PixelTestsStorySet
   from the old-style GPU tests.
   """
   def __init__(self, url, name, test_rect, revision,
                tolerance=2, browser_args=None, expected_colors=None):
@@ skipping 259 matching lines @@
 
 # Pages that should be run with experimental canvas features.
 def ExperimentalCanvasFeaturesPages(base_name):
   browser_args = ['--enable-experimental-canvas-features']
   unaccelerated_args = [
     '--disable-accelerated-2d-canvas',
     '--disable-gpu-compositing']
 
   return [
     PixelTestPage(
+      'pixel_offscreenCanvas_commit_frameless_doc.html',
+      base_name + '_OffscreenCanvasForFramelessDocument',
+      test_rect=[0, 0, 50, 50],
+      revision=1,
+      browser_args=browser_args),
+
+    PixelTestPage(
       'pixel_offscreenCanvas_transfer_after_style_resize.html',
       base_name + '_OffscreenCanvasTransferAfterStyleResize',
       test_rect=[0, 0, 350, 350],
       revision=1,
       browser_args=browser_args),
 
     PixelTestPage(
       'pixel_offscreenCanvas_transfer_before_style_resize.html',
       base_name + '_OffscreenCanvasTransferBeforeStyleResize',
       test_rect=[0, 0, 350, 350],
@@ skipping 178 matching lines @@
       test_rect=[0, 0, 300, 300],
       revision=4),
     PixelTestPage(
       'filter_effects.html',
       base_name + '_CSSFilterEffects_NoOverlays',
       test_rect=[0, 0, 300, 300],
       revision=4,
       tolerance=10,
       browser_args=['--disable-mac-overlays']),
   ]