Use sk_sp<SkBitmap::Allocator> instead of raw pointers or WTF::RefPtr<T>.

third_party/WebKit/Source/platform/graphics/ImageFrameGenerator.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 81 matching lines @@
 private:
     ImageFrameGenerator(const SkISize& fullSize, bool isMultiFrame);
 
     friend class ImageFrameGeneratorTest;
     friend class DeferredImageDecoderTest;
     // For testing. |factory| will overwrite the default ImageDecoder creation logic if |factory->create()| returns non-zero.
     void setImageDecoderFactory(std::unique_ptr<ImageDecoderFactory> factory) { m_imageDecoderFactory = std::move(factory); }
 
     void setHasAlpha(size_t index, bool hasAlpha);
 
-    SkBitmap tryToResumeDecode(SegmentReader*, bool allDataReceived, size_t index, const SkISize& scaledSize, SkBitmap::Allocator*);
+    SkBitmap tryToResumeDecode(SegmentReader*, bool allDataReceived, size_t index, const SkISize& scaledSize, sk_sp<SkBitmap::Allocator>);
     // This method should only be called while m_decodeMutex is locked.
-    bool decode(SegmentReader*, bool allDataReceived, size_t index, ImageDecoder**, SkBitmap*, SkBitmap::Allocator*);
+    bool decode(SegmentReader*, bool allDataReceived, size_t index, ImageDecoder**, SkBitmap*, sk_sp<SkBitmap::Allocator>);
 
     const SkISize m_fullSize;
 
     const bool m_isMultiFrame;
     bool m_decodeFailed;
     bool m_yuvDecodingFailed;
     size_t m_frameCount;
     Vector<bool> m_hasAlpha;
 
     std::unique_ptr<ImageDecoderFactory> m_imageDecoderFactory;
 
     // Prevents multiple decode operations on the same data.
     Mutex m_decodeMutex;
 
     // Protect concurrent access to m_hasAlpha.
     Mutex m_alphaMutex;
 };
 
 } // namespace blink
 
 #endif