Cleanup - Get rid of unnecessary local variables.

Trivial cleanup patch to get rid of not needed local variables.

TESTS=No tests as there is no behavior change.

Review URL: https://codereview.chromium.org/124973002

git-svn-id: svn://svn.chromium.org/blink/trunk@164615 bbb929c8-8fbe-4397-9dbb-9b2b20218538