Correctly rebaseline 2DCanvasWebGL pixel test

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,
                expected_colors=None, tolerance=2, browser_args=None):
@@ skipping 102 matching lines @@
           'size': [188, 8],
           'color': [255, 0, 0],
           'tolerance': 3
         }
       ]),
 
     PixelTestPage(
       'pixel_canvas2d_webgl.html',
       base_name + '_2DCanvasWebGL',
       test_rect=[0, 0, 300, 300],
-      revision=2),
+      revision=3),
 
     PixelTestPage(
       'pixel_background.html',
       base_name + '_SolidColorBackground',
       test_rect=[500, 500, 100, 100],
       revision=1),
   ]
 
 
 # Pages that should be run with experimental canvas features.
@@ skipping 168 matching lines @@
       test_rect=[0, 0, 300, 300],
       revision=2),
     PixelTestPage(
       'filter_effects.html',
       base_name + '_CSSFilterEffects_NoOverlays',
       test_rect=[0, 0, 300, 300],
       revision=2,
       tolerance=10,
       browser_args=['--disable-mac-overlays']),
   ]