Avoid devolving to a path when conservative clipping with RRects

src/core/SkRasterClip.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 SkRasterClip_DEFINED
 #define SkRasterClip_DEFINED
 
 #include "SkRegion.h"
 #include "SkAAClip.h"
 
+class SkRRect;
+
 class SkRasterClip {
 public:
     SkRasterClip(bool forceConservativeRects = false);
     SkRasterClip(const SkIRect&, bool forceConservativeRects = false);
     SkRasterClip(const SkRasterClip&);
     ~SkRasterClip();
 
     bool isForceConservativeRects() const { return fForceConservativeRects; }
 
     bool isBW() const { return fIsBW; }
@@ skipping 13 matching lines @@
 
     bool isComplex() const;
     const SkIRect& getBounds() const;
 
     bool setEmpty();
     bool setRect(const SkIRect&);
 
     bool op(const SkIRect&, SkRegion::Op);
     bool op(const SkRegion&, SkRegion::Op);
     bool op(const SkRect&, const SkISize&, SkRegion::Op, bool doAA);
+    bool op(const SkRRect&, const SkISize&, SkRegion::Op, bool doAA);
     bool op(const SkPath&, const SkISize&, SkRegion::Op, bool doAA);
     
     void translate(int dx, int dy, SkRasterClip* dst) const;
     void translate(int dx, int dy) {
         this->translate(dx, dy, this);
     }
 
     bool quickContains(const SkIRect& rect) const;
     bool quickContains(int left, int top, int right, int bottom) const {
         return quickContains(SkIRect::MakeLTRB(left, top, right, bottom));
@@ skipping 109 matching lines @@
 
 private:
     SkRegion        fBWRgn;
     SkAAClipBlitter fAABlitter;
     // what we return
     const SkRegion* fClipRgn;
     SkBlitter* fBlitter;
 };
 
 #endif