[Gardening] Try skipping image-backgrounds-not-antialiased on Mac OS 10.7 (Lion)
[Gardening] Try skipping image-backgrounds-not-antialiased on Mac OS 10.7 (Lion)

Let's see, whether would it help webkit_tests to complete.

BUG=524248

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@201246 bbb929c8-8fbe-4397-9dbb-9b2b20218538

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk