Rename IFWL classes which do not have CFWL equivalents

xfa/fwl/core/cfwl_spinbutton.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_CORE_IFWL_SPINBUTTON_H_
-#define XFA_FWL_CORE_IFWL_SPINBUTTON_H_
+#ifndef XFA_FWL_CORE_CFWL_SPINBUTTON_H_
+#define XFA_FWL_CORE_CFWL_SPINBUTTON_H_
 
 #include <memory>
 
 #include "xfa/fwl/core/cfwl_event.h"
 #include "xfa/fwl/core/cfwl_timer.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 #include "xfa/fxfa/cxfa_eventparam.h"
 
 #define FWL_STYLEEXE_SPB_Vert (1L << 0)
 
 class CFWL_MsgMouse;
 class CFWL_WidgetProperties;
 
-class IFWL_SpinButton : public IFWL_Widget {
+class CFWL_SpinButton : public IFWL_Widget {
  public:
-  IFWL_SpinButton(const CFWL_App* app,
+  CFWL_SpinButton(const CFWL_App* app,
                   std::unique_ptr<CFWL_WidgetProperties> properties);
-  ~IFWL_SpinButton() override;
+  ~CFWL_SpinButton() override;
 
   // IFWL_Widget
   FWL_Type GetClassID() const override;
   void GetWidgetRect(CFX_RectF& rect, bool bAutoSize = false) override;
   void Update() override;
   FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy) override;
   void DrawWidget(CFX_Graphics* pGraphics,
                   const CFX_Matrix* pMatrix = nullptr) override;
   void OnProcessMessage(CFWL_Message* pMessage) override;
   void OnProcessEvent(CFWL_Event* pEvent) override;
   void OnDrawWidget(CFX_Graphics* pGraphics,
                     const CFX_Matrix* pMatrix) override;
 
  private:
   class Timer : public CFWL_Timer {
    public:
-    explicit Timer(IFWL_SpinButton* pToolTip);
+    explicit Timer(CFWL_SpinButton* pToolTip);
     ~Timer() override {}
 
     void Run(CFWL_TimerInfo* pTimerInfo) override;
   };
-  friend class IFWL_SpinButton::Timer;
+  friend class CFWL_SpinButton::Timer;
 
   void EnableButton(bool bEnable, bool bUp = true);
   bool IsButtonEnabled(bool bUp = true);
   void DrawUpButton(CFX_Graphics* pGraphics,
                     IFWL_ThemeProvider* pTheme,
                     const CFX_Matrix* pMatrix);
   void DrawDownButton(CFX_Graphics* pGraphics,
                       IFWL_ThemeProvider* pTheme,
                       const CFX_Matrix* pMatrix);
   void OnFocusChanged(CFWL_Message* pMsg, bool bSet);
   void OnLButtonDown(CFWL_MsgMouse* pMsg);
   void OnLButtonUp(CFWL_MsgMouse* pMsg);
   void OnMouseMove(CFWL_MsgMouse* pMsg);
   void OnMouseLeave(CFWL_MsgMouse* pMsg);
   void OnKeyDown(CFWL_MsgKey* pMsg);
 
   CFX_RectF m_rtClient;
   CFX_RectF m_rtUpButton;
   CFX_RectF m_rtDnButton;
   uint32_t m_dwUpState;
   uint32_t m_dwDnState;
   int32_t m_iButtonIndex;
   bool m_bLButtonDwn;
   CFWL_TimerInfo* m_pTimerInfo;
-  IFWL_SpinButton::Timer m_Timer;
+  CFWL_SpinButton::Timer m_Timer;
 };
 
-#endif  // XFA_FWL_CORE_IFWL_SPINBUTTON_H_
+#endif  // XFA_FWL_CORE_CFWL_SPINBUTTON_H_