Avoid checks in createElementNS overload

Avoid doing the same qName checks another time by calling createElement directly.

Review URL: https://codereview.chromium.org/137863004

git-svn-id: svn://svn.chromium.org/blink/trunk@167113 bbb929c8-8fbe-4397-9dbb-9b2b20218538
1 file changed