Mark the compressed_cube WebGL2 test as passing on Windows.

BUG=614573
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
NOTRY=true

Review-Url: https://codereview.chromium.org/2165643003
Cr-Commit-Position: refs/heads/master@{#406367}

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

@@ -131,9 +131,6 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
     self.Fail('deqp/functional/gles3/fboinvalidate/whole.html',
         ['win'], bug=624506)
 
-    self.Fail('deqp/functional/gles3/textureformat/compressed_cube.html',
-        ['win'], bug=614573)
-
     # ANGLE bug id
     self.Fail('deqp/functional/gles3/fbomultisample*',
         ['win'], bug=1246)