blink: Cleanup class/struct forward declarations

third_party/WebKit/Source/platform/HostWindow.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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 16 matching lines @@
 #define HostWindow_h
 
 #include "platform/PlatformExport.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 class IntRect;
 class Widget;
-struct WebScreenInfo;
 
 class PLATFORM_EXPORT HostWindow
     : public GarbageCollectedFinalized<HostWindow> {
   WTF_MAKE_NONCOPYABLE(HostWindow);
 
  public:
   HostWindow() {}
   virtual ~HostWindow() {}
   DEFINE_INLINE_VIRTUAL_TRACE() {}
 
   // Requests the host invalidate the contents.
   virtual void invalidateRect(const IntRect& updateRect) = 0;
 
   // Converts the rect from the viewport coordinates to screen coordinates.
   virtual IntRect viewportToScreen(const IntRect&, const Widget*) const = 0;
 
   // Converts the scalar value from the window coordinates to the viewport
   // scale.
   virtual float windowToViewportScalar(const float) const = 0;
 
   virtual void scheduleAnimation(Widget*) = 0;
 };
 
 }  // namespace blink
 
 #endif  // HostWindow_h