Compile error on Mac:

http://build.chromium.org/p/chromium.gpu.fyi/builders/GPU%20Mac%20Builder/builds/29051

This reverts commit e423d9ca.

Change-Id: Ie08d7f2bf86089a006f3177480aa7491a9405257
Reviewed-on: https://chromium-review.googlesource.com/264585Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>