Fix memory leak in SkBlurImageFilter

src/effects/SkBlurImageFilter.cpp

 /*
  * Copyright 2011 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBlurImageFilter.h"
 
 #include "SkAutoPixmapStorage.h"
@@ skipping 79 matching lines @@
     }
     if (!inputBounds.intersect(dstBounds)) {
         return nullptr;
     }
 
     const SkVector sigma = map_sigma(fSigma, ctx.ctm());
 
 #if SK_SUPPORT_GPU
     if (source->isTextureBacked()) {
         GrContext* context = source->getContext();
-        GrTexture* inputTexture = input->asTextureRef(context);
+        SkAutoTUnref<GrTexture> inputTexture(input->asTextureRef(context));
         SkASSERT(inputTexture);
 
         if (0 == sigma.x() && 0 == sigma.y()) {
             offset->fX = inputBounds.x();
             offset->fY = inputBounds.y();
             return input->makeSubset(inputBounds.makeOffset(-inputOffset.x(),
                                                             -inputOffset.y()));
         }
 
         offset->fX = dstBounds.fLeft;
@@ skipping 131 matching lines @@
     str->appendf("SkBlurImageFilter: (");
     str->appendf("sigma: (%f, %f) input (", fSigma.fWidth, fSigma.fHeight);
 
     if (this->getInput(0)) {
         this->getInput(0)->toString(str);
     }
 
     str->append("))");
 }
 #endif