Create the IOSImageDataFetcher

ios/web/public/image_fetcher/webp_decoder.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef IOS_WEB_PUBLIC_IMAGE_FETCHER_WEBP_DECODER_H_
 #define IOS_WEB_PUBLIC_IMAGE_FETCHER_WEBP_DECODER_H_
 
 #import <Foundation/Foundation.h>
 #include <stddef.h>
 
@@ skipping 26 matching lines @@
     friend class base::RefCountedThreadSafe<WebpDecoder::Delegate>;
     virtual ~Delegate() {}
   };
 
   explicit WebpDecoder(WebpDecoder::Delegate* delegate);
 
   // For tests.
   static size_t GetHeaderSize();
 
   // Main entry point.
-  void OnDataReceived(const base::scoped_nsobject<NSData>& data);
+  void OnDataReceived(NSData* data);
 
   // Stops the decoding.
   void Stop();
 
  private:
   struct WebPIDecoderDeleter {
     inline void operator()(WebPIDecoder* ptr) const { WebPIDelete(ptr); }
   };
 
   enum State { READING_FEATURES, READING_DATA, DONE };
@@ skipping 11 matching lines @@
   WebpDecoder::State state_;
   std::unique_ptr<WebPIDecoder, WebPIDecoderDeleter> incremental_decoder_;
   base::scoped_nsobject<NSData> output_buffer_;
   base::scoped_nsobject<NSMutableData> features_;
   int has_alpha_;
 };
 
 }  // namespace webp_transcode
 
 #endif  // IOS_WEB_PUBLIC_IMAGE_FETCHER_WEBP_DECODER_H_