Convert single use EventTypes to class files.

xfa/fwl/core/ifwl_checkbox.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_CHECKBOX_H_
 #define XFA_FWL_CORE_IFWL_CHECKBOX_H_
 
 #include "xfa/fwl/core/cfwl_event.h"
@@ skipping 29 matching lines @@
 #define FWL_STATE_CKB_Pressed (1 << (FWL_WGTSTATE_MAX + 1))
 #define FWL_STATE_CKB_Unchecked (0 << (FWL_WGTSTATE_MAX + 2))
 #define FWL_STATE_CKB_Checked (1 << (FWL_WGTSTATE_MAX + 2))
 #define FWL_STATE_CKB_Neutral (2 << (FWL_WGTSTATE_MAX + 2))
 #define FWL_STATE_CKB_CheckMask (3L << (FWL_WGTSTATE_MAX + 2))
 
 class CFWL_MsgMouse;
 class CFWL_WidgetProperties;
 class IFWL_Widget;
 
-FWL_EVENT_DEF(CFWL_EvtCkbCheckStateChanged, CFWL_EventType::CheckStateChanged)
-
 class IFWL_CheckBoxDP : public IFWL_DataProvider {
  public:
   virtual FX_FLOAT GetBoxSize(IFWL_Widget* pWidget) = 0;
 };
 
 class IFWL_CheckBox : public IFWL_Widget {
  public:
   IFWL_CheckBox(const IFWL_App* app,
                 std::unique_ptr<CFWL_WidgetProperties> properties);
   ~IFWL_CheckBox() override;
@@ skipping 25 matching lines @@
   CFX_RectF m_rtClient;
   CFX_RectF m_rtBox;
   CFX_RectF m_rtCaption;
   CFX_RectF m_rtFocus;
   uint32_t m_dwTTOStyles;
   int32_t m_iTTOAlign;
   bool m_bBtnDown;
 };
 
 #endif  // XFA_FWL_CORE_IFWL_CHECKBOX_H_