Avoid devolving to a path when conservative clipping with RRects

src/core/SkCanvas.cpp

Index: src/core/SkCanvas.cpp
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 7d71ffb13bdd573ea0b014e66975e4c81de9393b..95a14e933b3947e1eec18f0339cc44c3cf9fbbed 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -1556,10 +1556,8 @@ void SkCanvas::onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle
 
         fClipStack->clipDevRRect(transformedRRect, op, kSoft_ClipEdgeStyle == edgeStyle);
 
-        SkPath devPath;
-        devPath.addRRect(transformedRRect);
-
-        rasterclip_path(&fMCRec->fRasterClip, this, devPath, op, kSoft_ClipEdgeStyle == edgeStyle);
+        fMCRec->fRasterClip.op(transformedRRect, this->getBaseLayerSize(), op,
+                               kSoft_ClipEdgeStyle == edgeStyle);
         return;
     }