That state change should really be in the frontend and not in each
backend.

Bug: angleproject:2594
Change-Id: I9d9396563ce42a41587b954892d6b4c6002c5072
Reviewed-on: https://chromium-review.googlesource.com/1101252
Commit-Queue: Luc Ferron <lucferron@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>