Get rid of NULLs in xfa/

xfa/fwl/core/fwl_formimp.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_FORMIMP_H_
 #define XFA_FWL_CORE_FWL_FORMIMP_H_
 
 #include "xfa/fwl/core/fwl_widgetimp.h"
@@ skipping 93 matching lines @@
   void ShowChildWidget(IFWL_Widget* pParent);
   void RemoveSysButtons();
   void CalcContentRect(CFX_RectF& rtContent);
   CFWL_SysBtn* GetSysBtnAtPoint(FX_FLOAT fx, FX_FLOAT fy);
   CFWL_SysBtn* GetSysBtnByState(uint32_t dwState);
   CFWL_SysBtn* GetSysBtnByIndex(int32_t nIndex);
   int32_t GetSysBtnIndex(CFWL_SysBtn* pBtn);
   FX_FLOAT GetCaptionHeight();
   void DrawCaptionText(CFX_Graphics* pGs,
                        IFWL_ThemeProvider* pTheme,
-                       const CFX_Matrix* pMatrix = NULL);
+                       const CFX_Matrix* pMatrix = nullptr);
   void DrawIconImage(CFX_Graphics* pGs,
                      IFWL_ThemeProvider* pTheme,
-                     const CFX_Matrix* pMatrix = NULL);
+                     const CFX_Matrix* pMatrix = nullptr);
   void GetEdgeRect(CFX_RectF& rtEdge);
   void SetWorkAreaRect();
   void SetCursor(FX_FLOAT fx, FX_FLOAT fy);
   void Layout();
   void ReSetSysBtn();
   void RegisterForm();
   void UnRegisterForm();
   FX_BOOL IsDoModal();
   void SetThemeData();
   FX_BOOL HasIcon();
@@ skipping 44 matching lines @@
   FX_BOOL m_bMouseIn;
   friend class CFWL_FormImpDelegate;
 };
 
 class CFWL_FormImpDelegate : public CFWL_WidgetImpDelegate {
  public:
   CFWL_FormImpDelegate(CFWL_FormImp* pOwner);
   void OnProcessMessage(CFWL_Message* pMessage) override;
   void OnProcessEvent(CFWL_Event* pEvent) override;
   void OnDrawWidget(CFX_Graphics* pGraphics,
-                    const CFX_Matrix* pMatrix = NULL) override;
+                    const CFX_Matrix* pMatrix = nullptr) override;
 
  protected:
   void OnLButtonDown(CFWL_MsgMouse* pMsg);
   void OnLButtonUp(CFWL_MsgMouse* pMsg);
   void OnMouseMove(CFWL_MsgMouse* pMsg);
   void OnMouseHover(CFWL_MsgMouse* pMsg);
   void OnMouseLeave(CFWL_MsgMouse* pMsg);
   void OnLButtonDblClk(CFWL_MsgMouse* pMsg);
   void OnWindowMove(CFWL_MsgWindowMove* pMsg);
   void OnClose(CFWL_MsgClose* pMsg);
   CFWL_FormImp* m_pOwner;
 };
 
 #endif  // XFA_FWL_CORE_FWL_FORMIMP_H_