WebKit side is https://bugs.webkit.org/show_bug.cgi?id=37310

Patch by morrita@google.com originally at
http://codereview.chromium.org/2478002/show

Review URL: http://codereview.chromium.org/2759007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@49376 0039d316-1c4b-4281-b951-d872f2087c98