PVS-Studio pointed out that seven GL functions were being initialized
twice. This isn't critical but is slightly inefficient.

R=jmadill@chromium.org
BUG=697659

Change-Id: I199bd06ae1136bc3b8efd519787d89f4447f326d
Reviewed-on: https://chromium-review.googlesource.com/448639Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>