Auto-rebaseline for r173939

http://src.chromium.org/viewvc/blink?view=revision&revision=173939

BUG=369009
TBR=loislo@chromium.org

Review URL: https://codereview.chromium.org/286613003

git-svn-id: svn://svn.chromium.org/blink/trunk@173950 bbb929c8-8fbe-4397-9dbb-9b2b20218538