Gardening: compositing/repaint/end-of-opacity-transition.html still flaky on Win.
Gardening: compositing/repaint/end-of-opacity-transition.html still flaky on Win.

BUG=450271
TBR=wangxianzhu@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1083913003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@193708 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