blink: Cleanup class forward declarations

third_party/WebKit/Source/platform/Widget.h

 /*
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2008 Collabora Ltd.  All rights reserved.
  * Copyright (C) 2013 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 22 matching lines @@
 #include "platform/geometry/IntRect.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebFocusType.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class CullRect;
 class Event;
 class GraphicsContext;
-class HostWindow;
 
 // The Widget class serves as a base class for FrameView, Scrollbar, and
 // PluginView.
 //
 // Widgets are connected in a hierarchy, with the restriction that plugins and
 // scrollbars are always leaves of the tree. Only FrameView can have children
 // (and therefore the Widget class has no concept of children).
 class PLATFORM_EXPORT Widget : public GarbageCollectedFinalized<Widget> {
  public:
   Widget();
@@ skipping 76 matching lines @@
  private:
   Member<Widget> m_parent;
   IntRect m_frameRect;
   bool m_selfVisible;
   bool m_parentVisible;
 };
 
 }  // namespace blink
 
 #endif  // Widget_h