Add a transform feedback workaround for Intel GPUs on MacOSX

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

 # Copyright (c) 2015 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.webgl_conformance_expectations import WebGLConformanceExpectations
 
 # See the GpuTestExpectations class for documentation.
 
 class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
   def __init__(self, conformance_path):
     super(WebGL2ConformanceExpectations, self).__init__(conformance_path)
@@ skipping 412 matching lines @@
     self.Fail('deqp/functional/gles3/shaderoperator/geometric.html',
         ['mac', 'amd'], bug=483282)
 
     # Mac Pro with AMD GPU
     self.Flaky('deqp/functional/gles3/shaderindexing/mat_01.html',
         ['mac', ('amd', 0x679e)], bug=636648)
 
     # Mac Intel
     self.Fail('deqp/functional/gles3/shadercommonfunction.html',
         ['mac', 'intel'], bug=483282)
-    self.Fail('deqp/functional/gles3/transformfeedback/*.html',
-        ['mac', 'intel'], bug=483282)
 
     self.Fail('deqp/functional/gles3/texturefiltering/2d_combinations_01.html',
         ['mac', 'intel'], bug=606074)
     self.Fail('deqp/functional/gles3/texturefiltering/' +
         'cube_combinations_01.html',
         ['mac', 'intel'], bug=606074)
     self.Fail('deqp/functional/gles3/texturefiltering/' +
         '2d_array_combinations_01.html',
         ['mac', 'intel'], bug=606074)
     self.Fail('deqp/functional/gles3/texturefiltering/3d_combinations_06.html',
@@ skipping 452 matching lines @@
     # self.Fail(page_name,
     #     ['linux', ('nvidia', 0x1), 'debug', 'opengl'])
     # self.Fail(page_name,
     #     ['win', ('nvidia', 0x1), 'debug', 'opengl'])
 
     # Conflicts if between a generic os condition and a specific version
     # self.Fail(page_name,
     #     ['xp', ('nvidia', 0x1), 'debug', 'opengl'])
     # self.Fail(page_name,
     #     ['win', ('nvidia', 0x1), 'debug', 'opengl'])