Merge the CFWL_*Imp classes into the IFWL_* classes.

xfa/fwl/basewidget/fwl_checkboximp.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_BASEWIDGET_FWL_CHECKBOXIMP_H_
-#define XFA_FWL_BASEWIDGET_FWL_CHECKBOXIMP_H_
-
-#include "xfa/fwl/core/fwl_widgetimp.h"
-#include "xfa/fwl/core/ifwl_widget.h"
-
-class CFWL_CheckBoxImpDelegate;
-class CFWL_MsgMouse;
-class CFWL_WidgetImpProperties;
-class IFWL_Widget;
-
-class CFWL_CheckBoxImp : public CFWL_WidgetImp {
- public:
-  CFWL_CheckBoxImp(const CFWL_WidgetImpProperties& properties,
-                   IFWL_Widget* pOuter);
-  ~CFWL_CheckBoxImp() override;
-
-  // CFWL_WidgetImp
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
-  FWL_Type GetClassID() const override;
-  FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
-  FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
-  FWL_Error Update() override;
-  FWL_Error DrawWidget(CFX_Graphics* pGraphics,
-                       const CFX_Matrix* pMatrix = nullptr) override;
-  int32_t GetCheckState();
-  FWL_Error SetCheckState(int32_t iCheck);
-
- protected:
-  friend class CFWL_CheckBoxImpDelegate;
-
-  void Layout();
-  uint32_t GetPartStates();
-  void UpdateTextOutStyles();
-  void NextStates();
-
-  CFX_RectF m_rtClient;
-  CFX_RectF m_rtBox;
-  CFX_RectF m_rtCaption;
-  CFX_RectF m_rtFocus;
-  uint32_t m_dwTTOStyles;
-  int32_t m_iTTOAlign;
-  FX_BOOL m_bBtnDown;
-};
-
-class CFWL_CheckBoxImpDelegate : public CFWL_WidgetImpDelegate {
- public:
-  CFWL_CheckBoxImpDelegate(CFWL_CheckBoxImp* pOwner);
-
-  void OnProcessMessage(CFWL_Message* pMessage) override;
-  void OnDrawWidget(CFX_Graphics* pGraphics,
-                    const CFX_Matrix* pMatrix = nullptr) override;
-
- protected:
-  void OnActivate(CFWL_Message* pMsg);
-  void OnFocusChanged(CFWL_Message* pMsg, FX_BOOL bSet = TRUE);
-  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);
-
-  CFWL_CheckBoxImp* m_pOwner;
-};
-
-#endif  // XFA_FWL_BASEWIDGET_FWL_CHECKBOXIMP_H_