Split big rrect aa effect up into separate images

include/core/SkRRect.h

Index: include/core/SkRRect.h
diff --git a/include/core/SkRRect.h b/include/core/SkRRect.h
index 8d8cdbf02c79de89e62360c6dc6296089c9faeb3..994edd2cc1c76b088f890b5e0ed174a865194b03 100644
--- a/include/core/SkRRect.h
+++ b/include/core/SkRRect.h
@@ -153,6 +153,12 @@ public:
         return rr;
     }
 
+    static SkRRect MakeRectXY(const SkRect& rect, SkScalar xRad, SkScalar yRad) {
+        SkRRect rr;
+        rr.setRectXY(rect, xRad, yRad);
+        return rr;
+    }
+
     /**
      * Set this RR to match the supplied oval. All x radii will equal half the
      * width and all y radii will equal half the height.