Instead of deferring this work, we can process it immediately. We have
access to the information we need in the prior and current states so
can optimize the update more effectively.

Bug: angleproject:2763
Change-Id: I77482b0ea490fddf403ccc4a4f32665301fd6e7a
Reviewed-on: https://chromium-review.googlesource.com/c/1254042Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>