update callsites for Make image factories

src/image/SkImage_Generator.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 "SkImage_Base.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 68 matching lines @@
 
     const SkImageInfo info = SkImageInfo::MakeN32(subset.width(), subset.height(),
                                       this->isOpaque() ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
     SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info));
     if (!surface) {
         return nullptr;
     }
     surface->getCanvas()->clear(0);
     surface->getCanvas()->drawImage(this, SkIntToScalar(-subset.x()), SkIntToScalar(-subset.y()),
                                     nullptr);
-    return sk_sp<SkImage>(surface->newImageSnapshot());
+    return surface->makeImageSnapshot();
 }
 
 sk_sp<SkImage> SkImage::MakeFromGenerator(SkImageGenerator* generator, const SkIRect* subset) {
     if (!generator) {
         return nullptr;
     }
     SkImageCacherator* cache = SkImageCacherator::NewFromGenerator(generator, subset);
     if (!cache) {
         return nullptr;
     }
     return sk_make_sp<SkImage_Generator>(cache);
 }