Clean up forward declarations in Source/core/editing

Source/core/editing/Editor.h

 /*
  * Copyright (C) 2006, 2007, 2008 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 24 matching lines @@
 #include "core/editing/TextIterator.h"
 #include "core/editing/VisibleSelection.h"
 #include "core/editing/WritingDirection.h"
 #include "core/frame/FrameDestructionObserver.h"
 #include "platform/PasteMode.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class CompositeEditCommand;
-class DataTransfer;
-class EditCommand;
 class EditCommandComposition;
 class EditorClient;
 class EditorInternalCommand;
 class LocalFrame;
-class HTMLElement;
 class HitTestResult;
 class KillRing;
 class Pasteboard;
-class SharedBuffer;
-class SimpleFontData;
 class SpellChecker;
 class StylePropertySet;
-class Text;
 class TextEvent;
 class UndoStack;
 
 enum EditorCommandSource { CommandFromMenuOrKeyBinding, CommandFromDOM, CommandFromDOMWithUserInterface };
 enum EditorParagraphSeparator { EditorParagraphSeparatorIsDiv, EditorParagraphSeparatorIsP };
 
 class Editor FINAL : public NoBaseWillBeGarbageCollectedFinalized<Editor> {
     WTF_MAKE_NONCOPYABLE(Editor);
 public:
     static PassOwnPtrWillBeRawPtr<Editor> create(LocalFrame&);
@@ skipping 225 matching lines @@
 
 inline bool Editor::markedTextMatchesAreHighlighted() const
 {
     return m_areMarkedTextMatchesHighlighted;
 }
 
 
 } // namespace blink
 
 #endif // Editor_h