Fold the GPU rasterization tests into the pixel tests step.

content/test/gpu/gpu_tests/pixel_expectations.py

 # Copyright 2014 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.
 
 from gpu_tests.gpu_test_expectations import GpuTestExpectations
 
 # See the GpuTestExpectations class for documentation.
 
 class PixelExpectations(GpuTestExpectations):
   def SetExpectations(self):
     # Sample Usage:
     # self.Fail('Pixel_Canvas2DRedBox',
     #     ['mac', 'amd', ('nvidia', 0x1234)], bug=123)
 
+    # Seems to be flaky on the new AMD R7 240 drivers.
+    self.Flaky('Pixel_GpuRasterization_BlueBox',
+        ['win', ('amd', 0x6613)], bug=653538)
+
     # Software compositing is not supported on Android; so we skip these tests
     # that disables gpu compositing on Android platforms.
     self.Skip('Pixel_OffscreenCanvasUnaccelerated2D', ['android'])
     self.Skip('Pixel_OffscreenCanvasUnaccelerated2DWorker', ['android'])
     self.Skip('Pixel_OffscreenCanvasWebGLSoftwareCompositing', ['android'])
     self.Skip('Pixel_OffscreenCanvasWebGLSoftwareCompositingWorker',
               ['android'])
     self.Skip('Pixel_CanvasDisplayLinearRGBUnaccelerated2D', ['android'])
 
     self.Fail('Pixel_ScissorTestWithPreserveDrawingBuffer',
@@ skipping 12 matching lines @@
     self.Flaky('*', ['linux', 'intel', 'debug'], bug=648369)
 
     # Flaky for unknown reasons only on macOS. Not planning to investigate
     # further.
     self.Flaky('Pixel_ScissorTestWithPreserveDrawingBuffer', ['mac'],
                bug=660461)
 
     # TODO(kainino): remove this once golden images are generated
     self.Fail('Pixel_WebGLTransparentGreenTriangle_NoAlpha_ImplicitClear',
               bug=666259)