(Reland) Port WebGL extension availability tests to the integration test harness.

content/test/gpu/gpu_tests/gpu_test_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 import test_expectations
 
 ANGLE_CONDITIONS = ['d3d9', 'd3d11', 'opengl', 'no_angle']
 
 GPU_CONDITIONS = ['amd', 'arm', 'broadcom', 'hisilicon', 'intel', 'imagination',
                   'nvidia', 'qualcomm', 'vivante']
@@ skipping 40 matching lines @@
       if cl in GPU_CONDITIONS:
         self.gpu_conditions.append(cl)
       elif cl in ANGLE_CONDITIONS:
         self.angle_conditions.append(cl)
       else:
         # Delegate to superclass.
         super(GpuExpectation, self).ParseCondition(condition)
 
 
 class GpuTestExpectations(test_expectations.TestExpectations):
+  def __init__(self, url_prefixes=None):
+    super(GpuTestExpectations, self).__init__(url_prefixes=url_prefixes)
+
   def CreateExpectation(self, expectation, pattern, conditions=None,
                         bug=None):
     return GpuExpectation(expectation, pattern, conditions, bug)
 
   def Flaky(self, pattern, conditions=None, bug=None, max_num_retries=2):
     self._AddExpectation(GpuExpectation(
       'flaky', pattern, conditions=conditions, bug=bug,
       max_num_retries=max_num_retries))
 
   def GetFlakyRetriesForPage(self, browser, page):
@@ skipping 53 matching lines @@
     if gpu_info and gpu_info.aux_attributes:
       gl_renderer = gpu_info.aux_attributes.get('gl_renderer')
       if gl_renderer and 'ANGLE' in gl_renderer:
         if 'Direct3D11' in gl_renderer:
           return 'd3d11'
         elif 'Direct3D9' in gl_renderer:
           return 'd3d9'
         elif 'OpenGL' in gl_renderer:
           return 'opengl'
     return 'no_angle'