Use smart pointers for class owned pointers

xfa/fwl/core/fwl_widgetimp.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_FWL_WIDGETIMP_H_
 #define XFA_FWL_CORE_FWL_WIDGETIMP_H_
 
+#include <memory>
+
 #include "core/fxcrt/include/fx_coordinates.h"
 #include "core/fxcrt/include/fx_system.h"
 #include "xfa/fwl/core/cfwl_event.h"
 #include "xfa/fwl/core/cfwl_themepart.h"
 #include "xfa/fwl/core/ifwl_widgetdelegate.h"
 #include "xfa/fwl/core/include/fwl_widgethit.h"
 #include "xfa/fwl/theme/cfwl_widgettp.h"
 
 class CFWL_AppImp;
 class CFWL_MsgKey;
@@ skipping 127 matching lines @@
                   IFWL_ThemeProvider* pTheme,
                   const CFX_Matrix* pMatrix = nullptr);
   void DrawEdge(CFX_Graphics* pGraphics,
                 CFWL_Part iPartEdge,
                 IFWL_ThemeProvider* pTheme,
                 const CFX_Matrix* pMatrix = nullptr);
   void NotifyDriver();
 
   FX_BOOL IsParent(IFWL_Widget* pParent);
 
-  CFWL_WidgetMgr* m_pWidgetMgr;
+  CFWL_WidgetMgr* const m_pWidgetMgr;
   CFWL_AppImp* m_pOwnerApp;
-  CFWL_WidgetImpProperties* m_pProperties;
+  std::unique_ptr<CFWL_WidgetImpProperties> m_pProperties;
   IFWL_WidgetDelegate* m_pDelegate;
   IFWL_WidgetDelegate* m_pCurDelegate;
   IFWL_Widget* m_pOuter;
   IFWL_Widget* m_pInterface;
   void* m_pLayoutItem;
   void* m_pAssociate;
   int32_t m_iLock;
   uint32_t m_nEventKey;
 };
 
 class CFWL_WidgetImpDelegate : public IFWL_WidgetDelegate {
  public:
   CFWL_WidgetImpDelegate();
   ~CFWL_WidgetImpDelegate() override {}
   void OnProcessMessage(CFWL_Message* pMessage) override;
   void OnProcessEvent(CFWL_Event* pEvent) override;
   void OnDrawWidget(CFX_Graphics* pGraphics,
                     const CFX_Matrix* pMatrix = nullptr) override;
 };
 
 #endif  // XFA_FWL_CORE_FWL_WIDGETIMP_H_