This can be easily implemented via a release call.

Bug: angleproject:2651
Change-Id: I0adb3ed385284c6342716cd7c347de9966a81bab
Reviewed-on: https://chromium-review.googlesource.com/1200368Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>