blink: Cleanup class forward declarations

third_party/WebKit/Source/modules/accessibility/AXLayoutObject.h

 /*
  * Copyright (C) 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
@@ skipping 25 matching lines @@
 
 namespace blink {
 
 class AXObjectCacheImpl;
 class AXSVGRoot;
 class Element;
 class FrameView;
 class HTMLAreaElement;
 class IntPoint;
 class Node;
-class Widget;
 
 class MODULES_EXPORT AXLayoutObject : public AXNodeObject {
   WTF_MAKE_NONCOPYABLE(AXLayoutObject);
 
  protected:
   AXLayoutObject(LayoutObject*, AXObjectCacheImpl&);
 
  public:
   static AXLayoutObject* create(LayoutObject*, AXObjectCacheImpl&);
   ~AXLayoutObject() override;
@@ skipping 161 matching lines @@
   AXRange textControlSelection() const;
   int indexForVisiblePosition(const VisiblePosition&) const;
   AXLayoutObject* getUnignoredObjectFromNode(Node&) const;
 };
 
 DEFINE_AX_OBJECT_TYPE_CASTS(AXLayoutObject, isAXLayoutObject());
 
 }  // namespace blink
 
 #endif  // AXLayoutObject_h