Revert "Revert "speed up A8 by creating a new entry-point in SkDraw that blits the path's coverage …

include/core/SkRect.h

Index: include/core/SkRect.h
diff --git a/include/core/SkRect.h b/include/core/SkRect.h
index 98acb1cda31731a407bfe3db63d23ccdd284a458..8bfa57a8f9f0d71b3a4b6e5fa69cb5e9571fa0d6 100644
--- a/include/core/SkRect.h
+++ b/include/core/SkRect.h
@@ -730,7 +730,7 @@ struct SK_API SkRect {
 
     /**
      *  Set the dst rectangle by rounding this rectangle's coordinates to their
-     *  nearest integer values using SkScalarRound.
+     *  nearest integer values using SkScalarRoundToInt.
      */
     void round(SkIRect* dst) const {
         SkASSERT(dst);
@@ -772,6 +772,15 @@ struct SK_API SkRect {
                  SkScalarFloorToInt(fRight), SkScalarFloorToInt(fBottom));
     }
 
+    /**
+     *  Return a new SkIRect which is contains the rounded coordinates of this
+     *  rect using SkScalarRoundToInt.
+     */
+    SkIRect round() const {
+        SkIRect ir;
+        this->round(&ir);
+        return ir;
+    }
 
     /**
      *  Swap top/bottom or left/right if there are flipped (i.e. if width()