Work around unknown Mac Intel driver bug causing non-deterministic behavior in GPU readback from 2D

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 9e1d7521b9e58ebc48519e9cf6882a708032f542..dba2eaafeae847872fa24b5c58a3b79c7e56ac1a 100644
--- a/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
+++ b/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
@@ -435,43 +435,16 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
     self.Fail('deqp/functional/gles3/framebufferblit/rect_04.html',
         ['mac', 'intel'], bug=483282)
 
-    self.Fail('conformance/textures/canvas_sub_rectangle/' +
-              'tex-2d-rgba-rgba-unsigned_byte.html',
-              ['mac', 'intel'], bug=665656)
-    self.Fail('conformance/textures/canvas_sub_rectangle/' +
-              'tex-2d-rgba-rgba-unsigned_short_4_4_4_4.html',
-              ['mac', 'intel'], bug=665656)
-    self.Fail('conformance/textures/canvas_sub_rectangle/' +
-              'tex-2d-rgba-rgba-unsigned_short_5_5_5_1.html',
-              ['mac', 'intel'], bug=665656)
-    self.Fail('conformance/textures/canvas_sub_rectangle/' +
-              'tex-2d-rgb-rgb-unsigned_byte.html',
-              ['mac', 'intel'], bug=665656)
-    self.Fail('conformance/textures/canvas_sub_rectangle/' +
-              'tex-2d-rgb-rgb-unsigned_short_5_6_5.html',
-              ['mac', 'intel'], bug=665656)
-    self.Fail('conformance2/textures/canvas_sub_rectangle/' +
-              'tex-2d-r8-red-unsigned_byte.html',
-              ['mac', 'intel'], bug=665656)
     self.Fail('conformance2/textures/canvas_sub_rectangle/' +
               'tex-2d-r8ui-red_integer-unsigned_byte.html',
               ['mac', '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)
     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)
     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)