Revert "Prevent masked solid-color draws from being turned into clears"

This reverts commit e9f2bbe082e9e1eb9d76e3043adedc9443427d8d.

Reason for revert: ANGLE

Original change's description:
> Prevent masked solid-color draws from being turned into clears
> 
> GrRenderTargetContext::drawRect was eliding a BlurMask filtered circle.
> 
> Bug: skia:7765
> Change-Id: Id98c059f7d786ee5c9bca839c8e099997ff2aedb
> Reviewed-on: https://skia-review.googlesource.com/122793
> Reviewed-by: Brian Salomon <bsalomon@google.com>

TBR=bsalomon@google.com,robertphillips@google.com

Change-Id: I1b7752eab0fcf55ab6248eed587fd85d438efd78
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:7765
Reviewed-on: https://skia-review.googlesource.com/122960
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
2 files changed