Move xfa/fwl/core to xfa/fwl.

xfa/fwl/cfwl_eventtarget.h

 // Copyright 2016 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#ifndef XFA_FWL_CORE_CFWL_EVENTTARGET_H_
-#define XFA_FWL_CORE_CFWL_EVENTTARGET_H_
+#ifndef XFA_FWL_CFWL_EVENTTARGET_H_
+#define XFA_FWL_CFWL_EVENTTARGET_H_
 
 #include <set>
 
 #include "core/fxcrt/fx_basic.h"
-#include "xfa/fwl/core/cfwl_event.h"
+#include "xfa/fwl/cfwl_event.h"
 
 class CFWL_Event;
 class CFWL_Widget;
 
 class CFWL_EventTarget {
  public:
   explicit CFWL_EventTarget(CFWL_Widget* pListener);
   ~CFWL_EventTarget();
 
   void SetEventSource(CFWL_Widget* pSource);
   bool ProcessEvent(CFWL_Event* pEvent);
 
   bool IsInvalid() const { return m_bInvalid; }
   void FlagInvalid() { m_bInvalid = true; }
 
  private:
   std::set<CFWL_Widget*> m_widgets;
   CFWL_Widget* m_pListener;
   bool m_bInvalid;
 };
 
-#endif  // XFA_FWL_CORE_CFWL_EVENTTARGET_H_
+#endif  // XFA_FWL_CFWL_EVENTTARGET_H_