update callsites for Make image factories

gm/dftext.cpp

 /*
  * Copyright 2011 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 "Resources.h"
 #include "SkCanvas.h"
 #include "SkStream.h"
@@ skipping 183 matching lines @@
             paint.setTypeface(fEmojiTypeface);
             paint.setTextSize(SkIntToScalar(19));
             canvas->drawText(fEmojiText, strlen(fEmojiText), 670, 90, paint);
         }
 #if SK_SUPPORT_GPU
         // render offscreen buffer
         if (surface) {
             SkAutoCanvasRestore acr(inputCanvas, true);
             // since we prepended this matrix already, we blit using identity
             inputCanvas->resetMatrix();
-            SkImage* image = surface->newImageSnapshot();
-            inputCanvas->drawImage(image, 0, 0, nullptr);
-            image->unref();
+            inputCanvas->drawImage(surface->makeImageSnapshot().get(), 0, 0, nullptr);
         }
 #endif
     }
 
 private:
     SkAutoTUnref<SkTypeface> fEmojiTypeface;
     const char* fEmojiText;
 
     typedef skiagm::GM INHERITED;
 };
 
 DEF_GM(return new DFTextGM;)