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>
diff --git a/tests/GrMeshTest.cpp b/tests/GrMeshTest.cpp
index e8c124d..aa951c0 100644
--- a/tests/GrMeshTest.cpp
+++ b/tests/GrMeshTest.cpp
@@ -392,7 +392,7 @@
 
 void DrawMeshHelper::drawMesh(const GrMesh& mesh) {
     GrRenderTargetProxy* proxy = fState->drawOpArgs().fProxy;
-    GrPipeline pipeline(proxy, GrScissorTest::kDisabled, SkBlendMode::kSrc);
+    GrPipeline pipeline(proxy, GrPipeline::ScissorState::kDisabled, SkBlendMode::kSrc);
     GrMeshTestProcessor mtp(mesh.isInstanced(), mesh.hasVertexData());
     fState->rtCommandBuffer()->draw(mtp, pipeline, nullptr, nullptr, &mesh, 1,
                                     SkRect::MakeIWH(kImageWidth, kImageHeight));