Bring sk_sp to GrDrawContext

src/gpu/GrLayerCache.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrLayerAtlas.h"
 #include "GrContext.h"
 #include "GrDrawContext.h"
@@ skipping 450 matching lines @@
 void GrLayerCache::purgeAll() {
     if (!fAtlas) {
         return;
     }
 
     this->purgePlots(false); // clear them all out
 
     SkASSERT(0 == fPictureHash.count());
 
     if (fAtlas->getTextureOrNull()) {
-        SkAutoTUnref<GrDrawContext> drawContext(
-                                    fContext->drawContext(fAtlas->getTexture()->asRenderTarget()));
+        sk_sp<GrDrawContext> drawContext(
+                       fContext->drawContext(sk_ref_sp(fAtlas->getTexture()->asRenderTarget())));
 
         if (drawContext) {
             drawContext->discard();
         }
     }
 }
 #endif
 
 void GrLayerCache::begin() {
     if (!fAtlas) {
@@ skipping 65 matching lines @@
         fileName.appendf("\\%d", layer->fKey.pictureID());
         for (int i = 0; i < layer->fKey.keySize(); ++i) {
             fileName.appendf("-%d", layer->fKey.key()[i]);
         }
         fileName.appendf(".png");
 
         layer->texture()->surfacePriv().savePixels(fileName.c_str());
     }
 }
 #endif