Remove NULL in xfa/

xfa/fxfa/app/xfa_fffield.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_FXFA_APP_XFA_FFFIELD_H_
 #define XFA_FXFA_APP_XFA_FFFIELD_H_
 
 #include "xfa/fwl/core/ifwl_widgetdelegate.h"
@@ skipping 39 matching lines @@
   FX_BOOL OnKeyDown(uint32_t dwKeyCode, uint32_t dwFlags) override;
   FX_BOOL OnKeyUp(uint32_t dwKeyCode, uint32_t dwFlags) override;
   FX_BOOL OnChar(uint32_t dwChar, uint32_t dwFlags) override;
   FWL_WidgetHit OnHitTest(FX_FLOAT fx, FX_FLOAT fy) override;
   FX_BOOL OnSetCursor(FX_FLOAT fx, FX_FLOAT fy) override;
 
   // IFWL_WidgetDelegate
   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;
 
   void UpdateFWL();
   uint32_t UpdateUIProperty();
 
  protected:
   FX_BOOL PtInActiveRect(FX_FLOAT fx, FX_FLOAT fy) override;
 
   virtual void SetFWLRect();
   void SetFWLThemeProvider();
   CFWL_Widget* GetNormalWidget() { return m_pNormalWidget; }
   void FWLToClient(FX_FLOAT& fx, FX_FLOAT& fy);
   void LayoutCaption();
-  void RenderCaption(CFX_Graphics* pGS, CFX_Matrix* pMatrix = NULL);
+  void RenderCaption(CFX_Graphics* pGS, CFX_Matrix* pMatrix = nullptr);
 
   int32_t CalculateOverride();
   int32_t CalculateWidgetAcc(CXFA_WidgetAcc* pAcc);
   FX_BOOL ProcessCommittedData();
   virtual FX_BOOL CommitData();
   virtual FX_BOOL IsDataChanged();
   void DrawHighlight(CFX_Graphics* pGS,
                      CFX_Matrix* pMatrix,
                      uint32_t dwStatus,
                      FX_BOOL bEllipse = FALSE);
   void DrawFocus(CFX_Graphics* pGS, CFX_Matrix* pMatrix);
   void TranslateFWLMessage(CFWL_Message* pMessage);
   void CapPlacement();
   void CapTopBottomPlacement(CXFA_Caption caption,
                              const CFX_RectF& rtWidget,
                              int32_t iCapPlacement);
   void CapLeftRightPlacement(CXFA_Caption caption,
                              const CFX_RectF& rtWidget,
                              int32_t iCapPlacement);
   void SetEditScrollOffset();
 
   CFWL_Widget* m_pNormalWidget;
   CFX_RectF m_rtUI;
   CFX_RectF m_rtCaption;
 };
 
 #endif  // XFA_FXFA_APP_XFA_FFFIELD_H_