Fix compile with gcc-4.4

These are the only changes that need to be made to Blink to compile
with gcc-4.4.

BUG=none

Review URL: https://codereview.chromium.org/71473005

git-svn-id: svn://svn.chromium.org/blink/trunk@162423 bbb929c8-8fbe-4397-9dbb-9b2b20218538