Add pixel test for solid color backgrounds.

content/test/gpu/page_sets/gpu_rasterization_tests.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 telemetry.story import story_set as story_set_module
 
 from gpu_tests import gpu_test_base
 
 class GpuRasterizationBlueBoxPage(gpu_test_base.PageBase):
 
   def __init__(self, story_set, expectations):
     super(GpuRasterizationBlueBoxPage, self).__init__(
       url='file://../../data/gpu/pixel_background.html',
       page_set=story_set,
       name='GpuRasterization.BlueBox',
       expectations=expectations)
 
     self.expectations = [
       {'comment': 'body-t',
-       'color': [255, 255, 255],
+       'color': [0, 128, 0],
        'tolerance': 0,
        'location': [5, 5],
        'size': [1, 1]},
       {'comment': 'body-r',
-       'color': [255, 255, 255],
+       'color': [0, 128, 0],
        'tolerance': 0,
        'location': [215, 5],
        'size': [1, 1]},
       {'comment': 'body-b',
-       'color': [255, 255, 255],
+       'color': [0, 128, 0],
        'tolerance': 0,
        'location': [215, 215],
        'size': [1, 1]},
       {'comment': 'body-l',
-       'color': [255, 255, 255],
+       'color': [0, 128, 0],
        'tolerance': 0,
        'location': [5, 215],
        'size': [1, 1]},
       {'comment': 'background-t',
        'color': [0, 0, 0],
        'tolerance': 0,
        'location': [30, 30],
        'size': [1, 1]},
       {'comment': 'background-r',
        'color': [0, 0, 0],
@@ skipping 80 matching lines @@
 
 class GpuRasterizationTestsStorySet(story_set_module.StorySet):
 
   """ Basic test cases for GPU rasterization. """
 
   def __init__(self, expectations):
     super(GpuRasterizationTestsStorySet, self).__init__()
 
     self.AddStory(GpuRasterizationBlueBoxPage(self, expectations))
     self.AddStory(GpuRasterizationConcavePathsPage(self, expectations))