This will fold away color filters before SW backend blitters see them.

Change-Id: Ic7c6e6b9aa5a9a863e8092d28b9577b043f3e520
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1883620
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710599}