Forcing the release ensures we always manually deallocate resources, and allows us to compile for different shader model versions after releasing the renderer. BUG=angle:619 Change-Id: I0c9d68a454c7779a024f4fcc4f4987c2abe12e60 Reviewed-on: https://chromium-review.googlesource.com/196820Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Nicolas Capens <nicolascapens@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>
