Shrink the reference image dimension in OffscreenCanvas tests

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 289 matching lines @@
     PixelTestPage(
       'pixel_offscreenCanvas_transferToImageBitmap_worker.html',
       base_name + '_OffscreenCanvasTransferToImageBitmapWorker',
       test_rect=[0, 0, 300, 300],
       revision=1,
       browser_args=browser_args),
 
     PixelTestPage(
       'pixel_offscreenCanvas_webgl_commit_main.html',
       base_name + '_OffscreenCanvasWebGLDefault',
-      test_rect=[0, 0, 600, 300],
-      revision=2,
+      test_rect=[0, 0, 400, 200],
+      revision=3,
       browser_args=browser_args),
 
     PixelTestPage(
       'pixel_offscreenCanvas_webgl_commit_worker.html',
       base_name + '_OffscreenCanvasWebGLDefaultWorker',
-      test_rect=[0, 0, 600, 300],
-      revision=2,
+      test_rect=[0, 0, 400, 200],
+      revision=3,
       browser_args=browser_args),
 
     PixelTestPage(
       'pixel_offscreenCanvas_webgl_commit_main.html',
       base_name + '_OffscreenCanvasWebGLSoftwareCompositing',
-      test_rect=[0, 0, 600, 300],
-      revision=3,
+      test_rect=[0, 0, 400, 200],
+      revision=4,
       browser_args=browser_args + ['--disable-gpu-compositing']),
 
     PixelTestPage(
       'pixel_offscreenCanvas_webgl_commit_worker.html',
       base_name + '_OffscreenCanvasWebGLSoftwareCompositingWorker',
-      test_rect=[0, 0, 600, 300],
-      revision=3,
+      test_rect=[0, 0, 400, 200],
+      revision=4,
       browser_args=browser_args + ['--disable-gpu-compositing']),
 
     PixelTestPage(
       'pixel_offscreenCanvas_2d_commit_main.html',
       base_name + '_OffscreenCanvasAccelerated2D',
-      test_rect=[0, 0, 600, 300],
-      revision=4,
+      test_rect=[0, 0, 400, 200],
+      revision=5,
       browser_args=browser_args),
 
     PixelTestPage(
       'pixel_offscreenCanvas_2d_commit_worker.html',
       base_name + '_OffscreenCanvasAccelerated2DWorker',
-      test_rect=[0, 0, 600, 300],
-      revision=4,
+      test_rect=[0, 0, 400, 200],
+      revision=5,
       browser_args=browser_args),
 
     PixelTestPage(
       'pixel_offscreenCanvas_2d_commit_main.html',
       base_name + '_OffscreenCanvasUnaccelerated2D',
-      test_rect=[0, 0, 600, 300],
-      revision=3,
+      test_rect=[0, 0, 400, 200],
+      revision=4,
       browser_args=browser_args + unaccelerated_args),
 
     PixelTestPage(
       'pixel_offscreenCanvas_2d_commit_worker.html',
       base_name + '_OffscreenCanvasUnaccelerated2DWorker',
-      test_rect=[0, 0, 600, 300],
-      revision=3,
+      test_rect=[0, 0, 400, 200],
+      revision=4,
       browser_args=browser_args + unaccelerated_args),
 
     PixelTestPage(
       'pixel_offscreenCanvas_2d_commit_main.html',
       base_name + '_OffscreenCanvasUnaccelerated2DGPUCompositing',
-      test_rect=[0, 0, 600, 300],
-      revision=5,
+      test_rect=[0, 0, 400, 200],
+      revision=6,
       browser_args=browser_args + ['--disable-accelerated-2d-canvas']),
 
     PixelTestPage(
       'pixel_offscreenCanvas_2d_commit_worker.html',
       base_name + '_OffscreenCanvasUnaccelerated2DGPUCompositingWorker',
-      test_rect=[0, 0, 600, 300],
-      revision=5,
+      test_rect=[0, 0, 400, 200],
+      revision=6,
       browser_args=browser_args + ['--disable-accelerated-2d-canvas']),
 
     PixelTestPage(
       'pixel_offscreenCanvas_2d_resize_on_worker.html',
       base_name + '_OffscreenCanvas2DResizeOnWorker',
       test_rect=[0, 0, 200, 200],
       revision=2,
       browser_args=browser_args),
 
     PixelTestPage(
@@ skipping 83 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']),
   ]