Avoid devolving to a path when conservative clipping with RRects

src/core/SkRasterClip.h

Index: src/core/SkRasterClip.h
diff --git a/src/core/SkRasterClip.h b/src/core/SkRasterClip.h
index 8a0681805cdb3f9a02052651b8d3f1b2780840a5..4e2b1416e8b8c5aaa4314db66d66a03412f9f0dc 100644
--- a/src/core/SkRasterClip.h
+++ b/src/core/SkRasterClip.h
@@ -11,6 +11,8 @@
 #include "SkRegion.h"
 #include "SkAAClip.h"
 
+class SkRRect;
+
 class SkRasterClip {
 public:
     SkRasterClip(bool forceConservativeRects = false);
@@ -44,6 +46,7 @@ public:
     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;