Revert of Begin weaning GrClipMaskManager off of GrDrawTarget (take 2)

src/gpu/GrDrawContextPriv.h

-/*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef GrDrawContextPriv_DEFINED
-#define GrDrawContextPriv_DEFINED
-
-#include "GrDrawContext.h"
-
-class GrStencilSettings;
-
-/** Class that adds methods to GrDrawContext that are only intended for use internal to Skia.
-    This class is purely a privileged window into GrDrawContext. It should never have additional
-    data members or virtual methods. */
-class GrDrawContextPriv {
-public:
-    bool drawAndStencilRect(const SkIRect* scissorRect,
-                            const GrStencilSettings&,
-                            SkRegion::Op op,
-                            bool invert,
-                            bool doAA,
-                            const SkMatrix& viewMatrix,
-                            const SkRect&);
-
-    bool drawAndStencilPath(const SkIRect* scissorRect,
-                            const GrStencilSettings&,
-                            SkRegion::Op op,
-                            bool invert,
-                            bool doAA,
-                            const SkMatrix& viewMatrix,
-                            const SkPath&);
-
-    void testingOnly_drawBatch(const GrPipelineBuilder& pipelineBuilder,
-                               GrDrawBatch* batch);
-
-private:
-    explicit GrDrawContextPriv(GrDrawContext* drawContext) : fDrawContext(drawContext) {}
-    GrDrawContextPriv(const GrRenderTargetPriv&) {} // unimpl
-    GrDrawContextPriv& operator=(const GrRenderTargetPriv&); // unimpl
-
-    // No taking addresses of this type.
-    const GrDrawContextPriv* operator&() const;
-    GrDrawContextPriv* operator&();
-
-    GrDrawContext* fDrawContext;
-        
-    friend class GrDrawContext; // to construct/copy this type.
-};
-
-inline GrDrawContextPriv GrDrawContext::drawContextPriv() { return GrDrawContextPriv(this); }
-
-inline const GrDrawContextPriv GrDrawContext::drawContextPriv () const {
-    return GrDrawContextPriv(const_cast<GrDrawContext*>(this));
-}
-
-#endif
-