switch surface to sk_sp

gm/imagefilterscropexpand.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 "gm.h"
 #include "SkCanvas.h"
 #include "SkColorFilter.h"
@@ skipping 125 matching lines @@
                 canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
                 canvas.restore();
             }
         }
     }
 
     static sk_sp<SkImage> MakeGradientCircle(int width, int height) {
         SkScalar x = SkIntToScalar(width / 2);
         SkScalar y = SkIntToScalar(height / 2);
         SkScalar radius = SkMinScalar(x, y) * 0.8f;
-        SkAutoTUnref<SkSurface> surface(SkSurface::NewRasterN32Premul(width, height));
+        auto surface(SkSurface::MakeRasterN32Premul(width, height));
         SkCanvas* canvas = surface->getCanvas();
         canvas->clear(0x00000000);
         SkColor colors[2];
         colors[0] = SK_ColorWHITE;
         colors[1] = SK_ColorBLACK;
         SkPaint paint;
         paint.setShader(SkGradientShader::MakeRadial(SkPoint::Make(x, y), radius, colors, nullptr,
                                                      2, SkShader::kClamp_TileMode));
         canvas->drawCircle(x, y, radius, paint);
 
@@ skipping 14 matching lines @@
 
         canvas->translate(SkIntToScalar(80), 0);
     }
 
     typedef GM INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return new ImageFiltersCropExpandGM; )