Remove failing expectations for pixel tests.

This is a follow-up patch for r273755.

BUG=368495
TBR=kbr@chromium.org

Review URL: https://codereview.chromium.org/304183008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@273986 0039d316-1c4b-4281-b951-d872f2087c98

content/test/gpu/gpu_tests/pixel_expectations.py

@@ -24,6 +24,4 @@ class PixelExpectations(test_expectations.TestExpectations):
     # self.Fail('Pixel.Canvas2DRedBox',
     #     ['mac', 'amd', ('nvidia', 0x1234)], bug=123)
 
-    self.Fail('Pixel.CSS3DBlueBox', bug=368495)
-
     pass