Rebase Pixel_CanvasDisplayLinearRGB* tests due to GPU raster enablement

GPU raster caused slight differences around antialiased div edges.

TBR=kbr@chromium.org

Bug: 900599
Change-Id: I2531fb642c50df820c5f4947d8670818217141c9
Reviewed-on: https://chromium-review.googlesource.com/c/1311835
Commit-Queue: Eric Karl <ericrk@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Eric Karl <ericrk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604460}

content/test/gpu/gpu_tests/pixel_expectations.py

@@ -137,3 +137,6 @@ class PixelExpectations(GpuTestExpectations):
     self.Fail('Pixel_BackgroundImage',
         ['android', ('qualcomm', 'Adreno (TM) 430')], bug=883500)
 
+    # Rebaslining due to GPU raster enablement. https://crbug.com/900599
+    self.Fail('Pixel_CanvasDisplayLinearRGBAccelerated2D')
+    self.Fail('Pixel_CanvasDisplayLinearRGBUnaccelerated2DGPUCompositing')

content/test/gpu/gpu_tests/pixel_test_pages.py

@@ -543,7 +543,7 @@ def ExperimentalCanvasFeaturesPages(base_name):
       'pixel_canvas_display_linear-rgb.html',
       base_name + '_CanvasDisplayLinearRGBAccelerated2D',
       test_rect=[0, 0, 140, 140],
-      revision=5,
+      revision=6,
       browser_args=browser_args),
 
     PixelTestPage(
@@ -557,7 +557,7 @@ def ExperimentalCanvasFeaturesPages(base_name):
       'pixel_canvas_display_linear-rgb.html',
       base_name + '_CanvasDisplayLinearRGBUnaccelerated2DGPUCompositing',
       test_rect=[0, 0, 140, 140],
-      revision=5,
+      revision=6,
       browser_args=browser_args + ['--disable-accelerated-2d-canvas']),
 
     PixelTestPage(