Auto-rebaseline for r178276

http://src.chromium.org/viewvc/blink?view=revision&revision=178276

BUG=391215
TBR=habib.virji@samsung.com

Review URL: https://codereview.chromium.org/398833002

git-svn-id: svn://svn.chromium.org/blink/trunk@178287 bbb929c8-8fbe-4397-9dbb-9b2b20218538