Fix expectation for WebGL2 conformance test failure on Retina Mac

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, url_prefixes=None, is_asan=False):
     super(WebGL2ConformanceExpectations, self).__init__(
@@ skipping 204 matching lines @@
         ['mac', ('nvidia', 0xfe9)], bug=483282)
     self.Fail('conformance/programs/gl-bind-attrib-location-test.html',
         ['mac', ('nvidia', 0xfe9)], bug=483282)
     self.Fail('conformance2/glsl3/loops-with-side-effects.html',
         ['mac', ('nvidia', 0xfe9)], bug=483282)
     self.Fail('conformance2/textures/misc/tex-input-validation.html',
         ['mac', ('nvidia', 0xfe9), 'no_angle'], bug=483282)
     self.Flaky('conformance2/textures/image_bitmap_from_video/' +
         'tex-2d-rgba16f-rgba-half_float.html',
         ['mac', ('nvidia', 0xfe9)], bug=682834)
+    self.Fail('conformance/uniforms/' +
+        'no-over-optimization-on-uniform-array-12.html',
+        ['mac', ('nvidia', 0xfe9)], bug=684903)
 
     self.Fail('deqp/functional/gles3/framebufferblit/conversion_04.html',
         ['mac', ('nvidia', 0xfe9)], bug=483282)
     self.Fail('deqp/functional/gles3/framebufferblit/conversion_07.html',
         ['mac', ('nvidia', 0xfe9)], bug=483282)
     self.Fail('deqp/functional/gles3/framebufferblit/conversion_08.html',
         ['mac', ('nvidia', 0xfe9)], bug=483282)
     self.Fail('deqp/functional/gles3/framebufferblit/conversion_10.html',
         ['mac', ('nvidia', 0xfe9)], bug=483282)
     self.Fail('deqp/functional/gles3/framebufferblit/conversion_11.html',
@@ skipping 796 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'])