Mark "virtual/gpu/fast/canvas/canvas-blending-image-over-pattern.html" as flaky

TBR=kpaulhamus@chromium.org

Bug: 862907
Change-Id: If6ce15cb1633ae74177e385774a1cef7010e67c0
Reviewed-on: https://chromium-review.googlesource.com/1134989
Reviewed-by: Mike West <mkwst@chromium.org>
Commit-Queue: Mike West <mkwst@chromium.org>
Cr-Commit-Position: refs/heads/master@{#574534}
1 file changed