blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/editing/iterators/BitStack.h

 /*
  * Copyright (C) 2004, 2006, 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 14 matching lines @@
 
 #ifndef BitStack_h
 #define BitStack_h
 
 #include "core/CoreExport.h"
 #include "wtf/Allocator.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
-class Node;
-
 class CORE_EXPORT BitStack {
   STACK_ALLOCATED();
 
  public:
   BitStack();
   ~BitStack();
 
   void push(bool);
   void pop();
 
   bool top() const;
   unsigned size() const;
 
  private:
   unsigned m_size;
   Vector<unsigned, 1> m_words;
 };
 
 }  // namespace blink
 
 #endif  // BitStack_h