Clean up forward declarations in Source/core

Source/core/rendering/FilterEffectRenderer.h

 /*
  * Copyright (C) 2011 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 18 matching lines @@
 #include "platform/graphics/filters/FilterEffect.h"
 #include "platform/heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class FilterOperations;
-class FloatRect;
-class GraphicsContext;
 class ReferenceFilter;
 class RenderObject;
 
 class FilterEffectRenderer final : public RefCountedWillBeGarbageCollectedFinalized<FilterEffectRenderer> {
     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
 public:
     static PassRefPtrWillBeRawPtr<FilterEffectRenderer> create()
     {
         return adoptRefWillBeNoop(new FilterEffectRenderer());
     }
@@ skipping 12 matching lines @@
 private:
     FilterEffectRenderer();
 
     RefPtrWillBeMember<FilterEffect> m_lastEffect;
     WillBeHeapVector<RefPtrWillBeMember<ReferenceFilter> > m_referenceFilters;
 };
 
 } // namespace blink
 
 #endif // FilterEffectRenderer_h