switch surface to sk_sp

gm/drawminibitmaprect.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 "gm.h"
 #include "SkColorPriv.h"
 #include "SkGradientShader.h"
 #include "SkImage.h"
 #include "SkRandom.h"
 #include "SkShader.h"
 #include "SkSurface.h"
 
 static sk_sp<SkImage> makebm(SkCanvas* caller, int w, int h) {
     SkImageInfo info = SkImageInfo::MakeN32Premul(w, h);
-    SkAutoTUnref<SkSurface> surface(caller->newSurface(info));
+    auto surface(caller->makeSurface(info));
     if (nullptr == surface) {
-        surface.reset(SkSurface::NewRaster(info));
+        surface = SkSurface::MakeRaster(info);
     }
     SkCanvas* canvas = surface->getCanvas();
 
     const SkScalar wScalar = SkIntToScalar(w);
     const SkScalar hScalar = SkIntToScalar(h);
 
     const SkPoint     pt = { wScalar / 2, hScalar / 2 };
 
     const SkScalar    radius = 4 * SkMaxScalar(wScalar, hScalar);
 
@@ skipping 103 matching lines @@
     bool            fAA;
     sk_sp<SkImage>  fImage;
     SkString        fName;
 
     typedef skiagm::GM INHERITED;
 };
 
 DEF_GM( return new DrawMiniBitmapRectGM(true); )
 DEF_GM( return new DrawMiniBitmapRectGM(false); )