Clean up Ganesh path render a little bit

src/gpu/GrBlurUtils.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrBlurUtils_DEFINED
 #define GrBlurUtils_DEFINED
 
@@ skipping 35 matching lines @@
      */
     void drawPathWithMaskFilter(GrContext*,
                                 GrDrawContext*,
                                 GrRenderTarget*,
                                 const GrClip&,
                                 const SkPath& path,
                                 GrPaint*,
                                 const SkMatrix& viewMatrix,
                                 const SkMaskFilter*,
                                 const SkPathEffect*,
-                                const GrStrokeInfo&);
+                                const GrStrokeInfo&,
+                                bool pathIsMutable);
 
 };
 
 #endif