Add asRRect method to SkClipStack::Element

src/core/SkClipStack.cpp

Index: src/core/SkClipStack.cpp
diff --git a/src/core/SkClipStack.cpp b/src/core/SkClipStack.cpp
index 4227eeac68fc8a7b2101422c084966db8414a0d9..4e53d8b850d5c9e11e9f53e9a153296ed187a384 100644
--- a/src/core/SkClipStack.cpp
+++ b/src/core/SkClipStack.cpp
@@ -21,6 +21,7 @@ int32_t SkClipStack::gGenID = kFirstUnreservedGenID;
 SkClipStack::Element::Element(const Element& that) {
     switch (that.getType()) {
         case kEmpty_Type:
+            fRRect.setEmpty();

[bsalomon, 2016/03/17 13:07:12]

Do we really care about doing this? The reason the path is reset is because it
can hold an arbitrarily large amount of memory. I don't think it's a big deal
either way. Could also just do this in debug.

Otherwise, lgtm.

             fPath.reset();
             break;
         case kRect_Type: // Rect uses rrect
@@ -171,6 +172,7 @@ void SkClipStack::Element::checkEmpty() const {
     SkASSERT(kNormal_BoundsType == fFiniteBoundType);
     SkASSERT(!fIsIntersectionOfRects);
     SkASSERT(kEmptyGenID == fGenID);
+    SkASSERT(fRRect.isEmpty());
     SkASSERT(!fPath.isValid());
 }