Bring sk_sp to GrDrawContext

gm/yuvtorgbeffect.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.
  */
 
 // This test only works with the GPU backend.
 
 #include "gm.h"
@@ skipping 61 matching lines @@
         GrRenderTarget* rt = canvas->internal_private_accessTopLayerRenderTarget();
         if (nullptr == rt) {
             return;
         }
         GrContext* context = rt->getContext();
         if (nullptr == context) {
             skiagm::GM::DrawGpuOnlyMessage(canvas);
             return;
         }
 
-        SkAutoTUnref<GrDrawContext> drawContext(context->drawContext(rt));
+        sk_sp<GrDrawContext> drawContext(context->drawContext(sk_ref_sp(rt)));
         if (!drawContext) {
             return;
         }
 
         SkAutoTUnref<GrTexture> texture[3];
         texture[0].reset(GrRefCachedBitmapTexture(context, fBmp[0],
                                                   GrTextureParams::ClampBilerp()));
         texture[1].reset(GrRefCachedBitmapTexture(context, fBmp[1],
                                                   GrTextureParams::ClampBilerp()));
         texture[2].reset(GrRefCachedBitmapTexture(context, fBmp[2],
@@ skipping 48 matching lines @@
 private:
     SkBitmap fBmp[3];
 
     typedef GM INHERITED;
 };
 
 DEF_GM(return new YUVtoRGBEffect;)
 }
 
 #endif