BUG=angleproject:1161

This is a re-land for commit ff2ab571. Dirty bits didn't check for
sampleMask, hence when sampleMask changed and nothing else, d3D
states didn't update. This commit also focuses on blend state for d3d11 to
make the cl change smaller and more manageable.

This commit also some performance regression issues that were occuring in
commit ff2ab571

Change-Id: I866066689911870a84125fa2150f9efbf1405ad0
Reviewed-on: https://chromium-review.googlesource.com/312468Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tryjob-Request: Dian Xiang <dianx@google.com>
Tested-by: Dian Xiang <dianx@google.com>