Make GrShape track the winding direction and starting point for rrect types.

include/core/SkRRect.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkRRect_DEFINED
 #define SkRRect_DEFINED
 
@@ skipping 123 matching lines @@
             this->setEmpty();
             return;
         }
 
         memset(fRadii, 0, sizeof(fRadii));
         fType = kRect_Type;
 
         SkDEBUGCODE(this->validate();)
     }
 
+    static SkRRect MakeEmpty() {
+        SkRRect rr;
+        rr.setEmpty();
+        return rr;
+    }
+
     static SkRRect MakeRect(const SkRect& r) {
         SkRRect rr;
         rr.setRect(r);
         return rr;
     }
-    
+
     static SkRRect MakeOval(const SkRect& oval) {
         SkRRect rr;
         rr.setOval(oval);
         return rr;
     }
 
     static SkRRect MakeRectXY(const SkRect& rect, SkScalar xRad, SkScalar yRad) {
         SkRRect rr;
         rr.setRectXY(rect, xRad, yRad);
         return rr;
@@ skipping 166 matching lines @@
 
     void computeType();
     bool checkCornerContainment(SkScalar x, SkScalar y) const;
     void scaleRadii();
 
     // to access fRadii directly
     friend class SkPath;
 };
 
 #endif