Clean up Ganesh path render a little bit

src/gpu/SkGpuDevice_drawTexture.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGpuDevice.h"
 
 #include "GrBlurUtils.h"
@@ skipping 215 matching lines @@
                                       fDrawContext,
                                       &grPaint,
                                       clip,
                                       viewMatrix,
                                       rec,
                                       rrect)) {
         return;
     }
     SkPath rectPath;
     rectPath.addRect(clippedDstRect);
+    rectPath.setIsVolatile(true);
     GrBlurUtils::drawPathWithMaskFilter(this->context(), fDrawContext, fRenderTarget, fClip,
                                         rectPath, &grPaint, viewMatrix, mf, paint.getPathEffect(),
-                                        GrStrokeInfo::FillInfo());
+                                        GrStrokeInfo::FillInfo(), true);
 }