Minor GrRenderTarget retraction

src/core/SkImageCacherator.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 "SkBitmap.h"
 #include "SkBitmapCache.h"
 #include "SkImage_Base.h"
@@ skipping 273 matching lines @@
             SK_HISTOGRAM_ENUMERATION("LockTexturePath", kCompressed_LockTexturePath,
                                      kLockTexturePathCount);
             return set_key_and_return(tex, key);
         }
     }
 
     // 4. Ask the generator to return YUV planes, which the GPU can convert
     {
         ScopedGenerator generator(this);
         Generator_GrYUVProvider provider(generator);
-        GrTexture* tex = provider.refAsTexture(ctx, desc, true);
+        sk_sp<GrTexture> tex = provider.refAsTexture(ctx, desc, true);
         if (tex) {
             SK_HISTOGRAM_ENUMERATION("LockTexturePath", kYUV_LockTexturePath,
                                      kLockTexturePathCount);
-            return set_key_and_return(tex, key);
+            return set_key_and_return(tex.release(), key);
         }
     }
 
     // 5. Ask the generator to return RGB(A) data, which the GPU can convert
     SkBitmap bitmap;
     if (this->tryLockAsBitmap(&bitmap, client, chint)) {
         GrTexture* tex = nullptr;
         if (willBeMipped) {
             tex = GrGenerateMipMapsAndUploadToTexture(ctx, bitmap);
         }
@@ skipping 23 matching lines @@
 }
 
 #else
 
 GrTexture* SkImageCacherator::lockAsTexture(GrContext* ctx, const GrTextureParams&,
                                             const SkImage* client, SkImage::CachingHint) {
     return nullptr;
 }
 
 #endif