Auto-rebaseline for r173348

http://src.chromium.org/viewvc/blink?view=revision&revision=173348

BUG=320139
TBR=dsinclair@chromium.org

Review URL: https://codereview.chromium.org/262093013

git-svn-id: svn://svn.chromium.org/blink/trunk@173407 bbb929c8-8fbe-4397-9dbb-9b2b20218538