Bug 1178871 - turn on WebGL conformance test |conformance/glsl/misc/struct-nesting-of-variable-names|. r=jgilbert

dom/canvas/test/webgl-conf/generated-mochitest.ini

@@ -2750,7 +2750,6 @@ fail-if = 1
 [generated/test_conformance__glsl__misc__struct-mixed-array-declarators.html]
 [generated/test_conformance__glsl__misc__struct-nesting-exceeds-maximum.html]
 [generated/test_conformance__glsl__misc__struct-nesting-of-variable-names.html]
-fail-if = (os == 'mac' && os_version == '10.10')
 [generated/test_conformance__glsl__misc__struct-nesting-under-maximum.html]
 [generated/test_conformance__glsl__misc__struct-specifiers-in-uniforms.html]
 [generated/test_conformance__glsl__misc__struct-unary-operators.html]

dom/canvas/test/webgl-conf/mochitest-errata.ini

@@ -439,11 +439,6 @@ fail-if = (os == 'mac' && os_version == '10.8')
 [generated/test_conformance__limits__gl-max-texture-dimensions.html]
 fail-if = (os == 'mac' && os_version == '10.8')
 
-####################
-# 10.10
-[generated/test_conformance__glsl__misc__struct-nesting-of-variable-names.html]
-fail-if = (os == 'mac' && os_version == '10.10')
-
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 # Win