Rename IFWL classes which do not have CFWL equivalents

xfa/fwl/core/cfwl_comboedit.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_IFWL_COMBOEDIT_H_
-#define XFA_FWL_CORE_IFWL_COMBOEDIT_H_
+#ifndef XFA_FWL_CORE_CFWL_COMBOEDIT_H_
+#define XFA_FWL_CORE_CFWL_COMBOEDIT_H_
 
 #include <memory>
 
 #include "xfa/fwl/core/cfwl_widgetproperties.h"
 #include "xfa/fwl/core/ifwl_edit.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
 class IFWL_ComboBox;
 
-class IFWL_ComboEdit : public IFWL_Edit {
+class CFWL_ComboEdit : public IFWL_Edit {
  public:
-  IFWL_ComboEdit(const CFWL_App* app,
+  CFWL_ComboEdit(const CFWL_App* app,
                  std::unique_ptr<CFWL_WidgetProperties> properties,
                  IFWL_Widget* pOuter);
 
   // IFWL_Edit.
   void OnProcessMessage(CFWL_Message* pMessage) override;
 
   void ClearSelected();
   void SetSelected();
   void FlagFocus(bool bSet);
 
  private:
   IFWL_ComboBox* m_pOuter;
 };
 
-#endif  // XFA_FWL_CORE_IFWL_COMBOEDIT_H_
+#endif  // XFA_FWL_CORE_CFWL_COMBOEDIT_H_