blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/editing/Position.h

 /*
  * Copyright (C) 2004, 2006, 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 20 matching lines @@
 #include "core/editing/EditingBoundary.h"
 #include "core/editing/EditingStrategy.h"
 #include "platform/heap/Handle.h"
 #include "platform/text/TextDirection.h"
 #include "wtf/Assertions.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
-class Element;
 class Node;
-class LayoutObject;
 class Text;
 enum class TextAffinity;
 class TreeScope;
 
 enum class PositionAnchorType : unsigned {
   OffsetInAnchor,
   BeforeAnchor,
   AfterAnchor,
   BeforeChildren,
   AfterChildren,
@@ skipping 223 matching lines @@
 
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const blink::Position&);
 void showTree(const blink::Position*);
 #endif
 
 #endif  // Position_h