Merge IFWL and CFWL classes.

xfa/fwl/theme/cfwl_monthcalendartp.h

 // Copyright 2014 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_THEME_CFWL_MONTHCALENDARTP_H_
 #define XFA_FWL_THEME_CFWL_MONTHCALENDARTP_H_
 
 #include <memory>
 
 #include "xfa/fwl/theme/cfwl_widgettp.h"
 
 class CFWL_MonthCalendarTP : public CFWL_WidgetTP {
  public:
   CFWL_MonthCalendarTP();
   ~CFWL_MonthCalendarTP() override;
 
   // CFWL_WidgetTP
   void Initialize() override;
   void Finalize() override;
-  bool IsValidWidget(IFWL_Widget* pWidget) override;
+  bool IsValidWidget(CFWL_Widget* pWidget) override;
   void DrawBackground(CFWL_ThemeBackground* pParams) override;
   void DrawText(CFWL_ThemeText* pParams) override;
   void* GetCapacity(CFWL_ThemePart* pThemePart,
                     CFWL_WidgetCapacity dwCapacity) override;
 
  protected:
   struct MCThemeData {
     FX_ARGB clrCaption;
     FX_ARGB clrSeperator;
     FX_ARGB clrDatesHoverBK;
@@ skipping 15 matching lines @@
   FWLTHEME_STATE GetState(uint32_t dwFWLStates);
 
   std::unique_ptr<MCThemeData> m_pThemeData;
   CFX_WideString wsResource;
 
  private:
   void SetThemeData();
 };
 
 #endif  // XFA_FWL_THEME_CFWL_MONTHCALENDARTP_H_