Clean up forward declarations in Source/core/editing

Source/core/editing/DOMSelection.h

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * 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.
@@ skipping 23 matching lines @@
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/frame/DOMWindowProperty.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
 class ExceptionState;
-class LocalFrame;
 class Node;
 class Position;
 class Range;
 class TreeScope;
 class VisibleSelection;
 
 class DOMSelection FINAL : public RefCountedWillBeGarbageCollected<DOMSelection>, public ScriptWrappable, public DOMWindowProperty {
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DOMSelection);
 public:
@@ skipping 56 matching lines @@
     bool isValidForPosition(Node*) const;
 
     void addConsoleError(const String& message);
 
     RawPtrWillBeMember<const TreeScope> m_treeScope;
 };
 
 } // namespace blink
 
 #endif // DOMSelection_h