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

include/gpu/GrClip.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrClip_DEFINED
 #define GrClip_DEFINED
 
@@ skipping 96 matching lines @@
             fClipType = kClipStack_ClipType;
             fClip.fStack = SkRef(clipStack);
             if (origin) {
                 fOrigin = *origin;
             } else {
                 fOrigin.setZero();
             }
         }
     }
 
-    void setIRect(const SkIRect& irect) {
-        this->reset();
-        fClipType = kIRect_ClipType;
-        fOrigin.setZero();
-        fClip.fIRect = irect;
-    }
-
     const SkIRect& irect() const {
         SkASSERT(kIRect_ClipType == fClipType);
         return fClip.fIRect;
     }
 
     void reset() {
         if (kClipStack_ClipType == fClipType) {
             fClip.fStack->unref();
             fClip.fStack = NULL;
         }
@@ skipping 49 matching lines @@
     union Clip {
         const SkClipStack* fStack;
         SkIRect fIRect;
     } fClip;
 
     SkIPoint fOrigin;
     ClipType fClipType;
 };
 
 #endif