Remove ref counting from CFWL_Event

xfa/fwl/core/cfwl_event.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_CFWL_EVENT_H_
 #define XFA_FWL_CORE_CFWL_EVENT_H_
 
 #include "core/fxcrt/fx_coordinates.h"
@@ skipping 60 matching lines @@
 class CFX_Graphics;
 class IFWL_Widget;
 
 class CFWL_Event {
  public:
   CFWL_Event();
   virtual ~CFWL_Event();
 
   virtual CFWL_EventType GetClassID() const;
 
-  uint32_t Release();
-
   IFWL_Widget* m_pSrcTarget;
   IFWL_Widget* m_pDstTarget;
-
- private:
-  uint32_t m_dwRefCount;
 };
 
 inline CFWL_Event::CFWL_Event()
-    : m_pSrcTarget(nullptr), m_pDstTarget(nullptr), m_dwRefCount(1) {}
+    : m_pSrcTarget(nullptr), m_pDstTarget(nullptr) {}
 
 inline CFWL_Event::~CFWL_Event() {}
 
 inline CFWL_EventType CFWL_Event::GetClassID() const {
   return CFWL_EventType::None;
 }
 
-inline uint32_t CFWL_Event::Release() {
-  m_dwRefCount--;
-  uint32_t dwRefCount = m_dwRefCount;
-  if (!m_dwRefCount)
-    delete this;
-  return dwRefCount;
-}
-
 #define FWL_EVENT_DEF(classname, eventType, ...)                            \
   class classname : public CFWL_Event {                                     \
    public:                                                                  \
     classname();                                                            \
     ~classname() override;                                                  \
     CFWL_EventType GetClassID() const override;                             \
     __VA_ARGS__                                                             \
   };                                                                        \
   inline classname::classname() {}                                          \
   inline classname::~classname() {}                                         \
@@ skipping 30 matching lines @@
 
 FWL_EVENT_DEF(CFWL_EvtClose, CFWL_EventType::Close)
 
 FWL_EVENT_DEF(CFWL_EvtSizeChanged,
               CFWL_EventType::SizeChanged,
               IFWL_Widget* m_pWidget;
               CFX_RectF m_rtOld;
               CFX_RectF m_rtNew;)
 
 #endif  // XFA_FWL_CORE_CFWL_EVENT_H_