add new onClip* methods to SkCanvas

src/core/SkBBoxHierarchyRecord.h

Index: src/core/SkBBoxHierarchyRecord.h
===================================================================
--- src/core/SkBBoxHierarchyRecord.h	(revision 13622)
+++ src/core/SkBBoxHierarchyRecord.h	(working copy)
@@ -35,21 +35,15 @@
     virtual bool concat(const SkMatrix& matrix) SK_OVERRIDE;
     virtual void setMatrix(const SkMatrix& matrix) SK_OVERRIDE;
 
-    virtual bool clipRect(const SkRect& rect,
-                          SkRegion::Op op = SkRegion::kIntersect_Op,
-                          bool doAntiAlias = false) SK_OVERRIDE;
-    virtual bool clipRegion(const SkRegion& region,
-                            SkRegion::Op op = SkRegion::kIntersect_Op) SK_OVERRIDE;
-    virtual bool clipPath(const SkPath& path,
-                          SkRegion::Op op = SkRegion::kIntersect_Op,
-                          bool doAntiAlias = false) SK_OVERRIDE;
-    virtual bool clipRRect(const SkRRect& rrect,
-                           SkRegion::Op op = SkRegion::kIntersect_Op,
-                           bool doAntiAlias = false) SK_OVERRIDE;
-
     // Implementation of the SkBBoxHierarchyClient interface
     virtual bool shouldRewind(void* data) SK_OVERRIDE;
 
+protected:
+    virtual void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
+    virtual void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
+    virtual void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
+    virtual void onClipRegion(const SkRegion&, SkRegion::Op) SK_OVERRIDE;
+
 private:
     typedef SkBBoxRecord INHERITED;
 };