Auto-rebaseline for r173909

http://src.chromium.org/viewvc/blink?view=revision&revision=173909

BUG=363767
TBR=pdr@chromium.org

Review URL: https://codereview.chromium.org/276573005

git-svn-id: svn://svn.chromium.org/blink/trunk@173923 bbb929c8-8fbe-4397-9dbb-9b2b20218538