WebGL expectations: add unittest checking pages exist.

content/test/gpu/gpu_tests/webgl_conformance_expectations.py

 # Copyright (c) 2013 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.
 import os
 
 from gpu_tests.gpu_test_expectations import GpuTestExpectations
 
 # See the GpuTestExpectations class for documentation.
 
 class WebGLConformanceExpectations(GpuTestExpectations):
   def __init__(self, conformance_path):
     self.conformance_path = conformance_path
     super(WebGLConformanceExpectations, self).__init__()
 
   def Fail(self, pattern, condition=None, bug=None):
     self.CheckPatternIsValid(pattern)
     GpuTestExpectations.Fail(self, pattern, condition, bug)
 
+  def Flaky(self, pattern, condition=None, bug=None, max_num_retries=2):
+    self.CheckPatternIsValid(pattern)
+    GpuTestExpectations.Flaky(self, pattern, condition, bug=bug,
+        max_num_retries=max_num_retries)
+
   def Skip(self, pattern, condition=None, bug=None):
     self.CheckPatternIsValid(pattern)
     GpuTestExpectations.Skip(self, pattern, condition, bug)
 
   def CheckPatternIsValid(self, pattern):
     # Look for basic wildcards.
     if not '*' in pattern and not 'WebglExtension.' in pattern:
       full_path = os.path.normpath(os.path.join(self.conformance_path, pattern))
       if not os.path.exists(full_path):
         raise Exception('The WebGL conformance test path specified in ' +
@@ skipping 496 matching lines @@
     self.Fail('conformance/textures/misc/texture-npot.html',
         ['chromeos', ('intel', 0xa011)], bug=375554)
     self.Fail('conformance/textures/misc/texture-npot-video.html',
         ['chromeos', ('intel', 0xa011)], bug=375554)
     self.Fail('conformance/textures/misc/texture-size.html',
         ['chromeos', ('intel', 0xa011)], bug=375554)
     self.Fail('conformance/uniforms/gl-uniform-arrays.html',
         ['chromeos', ('intel', 0xa011)], bug=375554)
     self.Skip('conformance/uniforms/uniform-default-values.html',
         ['chromeos', ('intel', 0xa011)], bug=375554)