Auto-rebaseline for r180421

http://src.chromium.org/viewvc/blink?view=revision&revision=180421

BUG=388780
TBR=jinho.bang@samsung.com

Review URL: https://codereview.chromium.org/483423002

git-svn-id: svn://svn.chromium.org/blink/trunk@180578 bbb929c8-8fbe-4397-9dbb-9b2b20218538