Shrink the reference image dimension in OffscreenCanvas tests

content/test/gpu/gpu_tests/pixel_test_pages.py

Index: content/test/gpu/gpu_tests/pixel_test_pages.py
diff --git a/content/test/gpu/gpu_tests/pixel_test_pages.py b/content/test/gpu/gpu_tests/pixel_test_pages.py
index 474aefba0498c0d3b7340ace0c0bf5db4cc96d56..2e990c417faa9a6056a55cd0789b1c59c308974c 100644
--- a/content/test/gpu/gpu_tests/pixel_test_pages.py
+++ b/content/test/gpu/gpu_tests/pixel_test_pages.py
@@ -307,71 +307,71 @@ def ExperimentalCanvasFeaturesPages(base_name):
     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(