As reported by GCC 4.8.1/MinGW.

Change-Id: If62d234074a0a9180f1f3c3619dbb2dd8047d0f3
Reviewed-on: https://chromium-review.googlesource.com/208670Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Tested-by: Andrew Knight <andrew.knight@digia.com>