Remove NULL in xfa/

xfa/fxfa/app/xfa_fftextedit.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_FFTEXTEDIT_H_
 #define XFA_FXFA_APP_XFA_FFTEXTEDIT_H_
 
 #include <vector>
@@ skipping 27 matching lines @@
   FX_BOOL SelectAll() override;
   FX_BOOL Delete() override;
   FX_BOOL DeSelect() override;
   FX_BOOL GetSuggestWords(CFX_PointF pointf,
                           std::vector<CFX_ByteString>& sSuggest) override;
   FX_BOOL ReplaceSpellCheckWord(CFX_PointF pointf,
                                 const CFX_ByteStringC& bsReplace) override;
   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 OnTextChanged(IFWL_Widget* pWidget,
                      const CFX_WideString& wsChanged,
                      const CFX_WideString& wsPrevText);
   void OnTextFull(IFWL_Widget* pWidget);
   FX_BOOL CheckWord(const CFX_ByteStringC& sWord);
   FX_BOOL GetSuggestWords(const CFX_ByteStringC& sWord,
                           std::vector<CFX_ByteString>& sSuggest);
 
  protected:
@@ skipping 75 matching lines @@
  protected:
   FX_BOOL PtInActiveRect(FX_FLOAT fx, FX_FLOAT fy) override;
   FX_BOOL CommitData() override;
   FX_BOOL UpdateFWLData() override;
   FX_BOOL IsDataChanged() override;
 
   uint32_t GetAlignment();
 };
 
 #endif  // XFA_FXFA_APP_XFA_FFTEXTEDIT_H_