Fall back to using clip effect for outer rrect in drawdrrect

src/gpu/GrDrawState.h

Index: src/gpu/GrDrawState.h
diff --git a/src/gpu/GrDrawState.h b/src/gpu/GrDrawState.h
index 78739ec680f4ec728815fd1c3298788beb026783..6cefd9776134773a0b2136aadf2e8f03fe7bbb4e 100644
--- a/src/gpu/GrDrawState.h
+++ b/src/gpu/GrDrawState.h
@@ -411,6 +411,8 @@ public:
             }
         }
 
+        bool isSet() const { return NULL != fDrawState; }
+
     private:
         GrDrawState* fDrawState;
         int fColorEffectCnt;