tighten failure expectations already worked around in WebGL roll

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

Index: content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
diff --git a/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py b/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
index f773416aa45e06a5fc054eb715a2e2b68255ebb0..c79254811a2a1ed5d0f0cd05575635320a24fc97 100644
--- a/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
+++ b/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
@@ -457,25 +457,25 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
               ['mac', 'intel'], bug=665656)
     self.Fail('conformance2/textures/canvas_sub_rectangle/' +
               'tex-2d-r8ui-red_integer-unsigned_byte.html',
-              ['mac', 'intel'], bug=665656)
+              ['yosemite', 'intel'], bug=665656)
     self.Fail('conformance2/textures/canvas_sub_rectangle/' +
               'tex-2d-rg8-rg-unsigned_byte.html',
               ['mac', 'intel'], bug=665656)
     self.Fail('conformance2/textures/canvas_sub_rectangle/' +
               'tex-2d-rg8ui-rg_integer-unsigned_byte.html',
-              ['mac', 'intel'], bug=665656)
+              ['yosemite', 'intel'], bug=665656)
     self.Fail('conformance2/textures/canvas_sub_rectangle/' +
               'tex-2d-rgb8-rgb-unsigned_byte.html',
               ['mac', 'intel'], bug=665656)
     self.Fail('conformance2/textures/canvas_sub_rectangle/' +
               'tex-2d-rgb8ui-rgb_integer-unsigned_byte.html',
-              ['mac', 'intel'], bug=665656)
+              ['yosemite', 'intel'], bug=665656)
     self.Fail('conformance2/textures/canvas_sub_rectangle/' +
               'tex-2d-rgba8-rgba-unsigned_byte.html',
               ['mac', 'intel'], bug=665656)
     self.Fail('conformance2/textures/canvas_sub_rectangle/' +
               'tex-2d-rgba8ui-rgba_integer-unsigned_byte.html',
-              ['mac', 'intel'], bug=665656)
+              ['yosemite', 'intel'], bug=665656)
 
     self.Fail('conformance2/textures/image_data/' +
         'tex-2d-rgba8ui-rgba_integer-unsigned_byte.html',