blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/imagebitmap/ImageBitmapFactories.h

 /*
  * Copyright (c) 2013, 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 35 matching lines @@
 class SkImage;
 
 namespace blink {
 
 class Blob;
 class EventTarget;
 class ExceptionState;
 class ExecutionContext;
 class ImageBitmapSource;
 class ImageBitmapOptions;
-class ImageDecoder;
 class WebTaskRunner;
 
 typedef HTMLImageElementOrHTMLVideoElementOrHTMLCanvasElementOrBlobOrImageDataOrImageBitmap
     ImageBitmapSourceUnion;
 
 class ImageBitmapFactories final
     : public GarbageCollectedFinalized<ImageBitmapFactories>,
       public Supplement<LocalDOMWindow>,
       public Supplement<WorkerGlobalScope> {
   USING_GARBAGE_COLLECTED_MIXIN(ImageBitmapFactories);
@@ skipping 87 matching lines @@
 
   void addLoader(ImageBitmapLoader*);
   void didFinishLoading(ImageBitmapLoader*);
 
   HeapHashSet<Member<ImageBitmapLoader>> m_pendingLoaders;
 };
 
 }  // namespace blink
 
 #endif  // ImageBitmapFactories_h