[ImageResource 4] Split ImageResource into Resource and Image parts

third_party/WebKit/Source/core/html/ImageDocument.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple 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 23 matching lines @@
 
 class ImageResource;
 
 class CORE_EXPORT ImageDocument final : public HTMLDocument {
  public:
   static ImageDocument* create(
       const DocumentInit& initializer = DocumentInit()) {
     return new ImageDocument(initializer);
   }
 
-  ImageResource* cachedImage();
+  ImageResourceContent* cachedImage();
+
+  // TODO(hiroshige): Remove this.
+  ImageResource* cachedImageResourceDeprecated();
+
   HTMLImageElement* imageElement() const { return m_imageElement.get(); }
 
   void windowSizeChanged();
   void imageUpdated();
   void imageClicked(int x, int y);
   void imageLoaded();
   void updateImageStyle();
 
   DECLARE_VIRTUAL_TRACE();
 
@@ skipping 40 matching lines @@
 
   enum ShrinkToFitMode { Viewport, Desktop };
   ShrinkToFitMode m_shrinkToFitMode;
 };
 
 DEFINE_DOCUMENT_TYPE_CASTS(ImageDocument);
 
 }  // namespace blink
 
 #endif  // ImageDocument_h