Revert "Some scissor state cleanup."

This reverts commit a219419c9d76432dca74494b611ff1f59086d139.

Reason for revert: breaking things
Original change's description:
> Some scissor state cleanup.
> 
> Separate flushing the enablement of scissor from the rect in GrGLGpu.
> 
> Move GrPipeline::ScissorState to a global enum and use more broadly.
> Rename to GrScissorTest to avoid name conflict with existing
> GrScissorState.
> 
> Change-Id: Ib32160b3300bc12de2d2e1761d152fd1bba8b683
> Reviewed-on: https://skia-review.googlesource.com/137395
> Commit-Queue: Brian Salomon <bsalomon@google.com>
> Reviewed-by: Chris Dalton <csmartdalton@google.com>

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

Change-Id: If71a5c5efc86d4239b40675bad2a6cb1f77460f8
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/138900
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
23 files changed