Move xfa/include/fwl/{core,basewidget} to xfa/fwl/{core,basewidget}.

xfa/fwl/core/ifwl_custompanel.h

-// Copyright 2014 PDFium Authors. All rights reserved.
+// 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_INCLUDE_FWL_CORE_FWL_PANEL_H_
-#define XFA_INCLUDE_FWL_CORE_FWL_PANEL_H_
+#ifndef XFA_FWL_CORE_IFWL_CUSTOMPANEL_H_
+#define XFA_FWL_CORE_IFWL_CUSTOMPANEL_H_
 
 #include "xfa/fwl/core/fwl_widgetimp.h"
+#include "xfa/fwl/core/ifwl_widget.h"
 
-class IFWL_Content;
-
-#define FWL_CLASS_Panel L"FWL_Panel"
-#define FWL_CLASSHASH_Panel 881567292
-
-class IFWL_Panel : public IFWL_Widget {
- public:
-  static IFWL_Panel* Create(CFWL_WidgetImpProperties& properties,
-                            IFWL_Widget* pOuter);
-
-  IFWL_Content* GetContent();
-  FWL_ERR SetContent(IFWL_Content* pContent);
-
- protected:
-  IFWL_Panel();
-};
+class IFWL_Proxy;
 
 class IFWL_CustomPanel : public IFWL_Widget {
  public:
   static IFWL_CustomPanel* Create(CFWL_WidgetImpProperties& properties,
                                   IFWL_Widget* pOuter);
 
   IFWL_Content* GetContent();
   FWL_ERR SetContent(IFWL_Content* pContent);
   FWL_ERR SetProxy(IFWL_Proxy* pProxy);
 
  protected:
   IFWL_CustomPanel();
 };
 
-#endif  // XFA_INCLUDE_FWL_CORE_FWL_PANEL_H_
+#endif  // XFA_FWL_CORE_IFWL_CUSTOMPANEL_H_