Get rid of NULLs in core/

core/fxcrt/xml_int.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 CORE_FXCRT_XML_INT_H_
 #define CORE_FXCRT_XML_INT_H_
 
 #include <algorithm>
@@ skipping 30 matching lines @@
 
  protected:
   const uint8_t* m_pBuffer;
   size_t m_dwSize;
   size_t m_dwCurPos;
 };
 
 class CXML_DataStmAcc : public IFX_BufferRead {
  public:
   explicit CXML_DataStmAcc(IFX_FileRead* pFileRead)
-      : m_pFileRead(pFileRead), m_pBuffer(NULL), m_nStart(0), m_dwSize(0) {
+      : m_pFileRead(pFileRead), m_pBuffer(nullptr), m_nStart(0), m_dwSize(0) {
     ASSERT(m_pFileRead);
   }
   ~CXML_DataStmAcc() override { FX_Free(m_pBuffer); }
 
   void Release() override { delete this; }
   FX_BOOL IsEOF() override {
     return m_nStart + (FX_FILESIZE)m_dwSize >= m_pFileRead->GetSize();
   }
   FX_FILESIZE GetPosition() override {
     return m_nStart + (FX_FILESIZE)m_dwSize;
@@ skipping 59 matching lines @@
                             const CFX_WideStringC& content,
                             CXML_Element* pElement);
   void InsertCDATASegment(CFX_UTF8Decoder& decoder, CXML_Element* pElement);
 };
 
 void FX_XML_SplitQualifiedName(const CFX_ByteStringC& bsFullName,
                                CFX_ByteStringC& bsSpace,
                                CFX_ByteStringC& bsName);
 
 #endif  // CORE_FXCRT_XML_INT_H_