Get rid of NULLs in fpdfsdk/

fpdfsdk/javascript/JS_GlobalData.cpp

 // 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
 
 #include "fpdfsdk/javascript/JS_GlobalData.h"
 
 #include "core/fdrm/crypto/include/fx_crypt.h"
 #include "third_party/base/stl_util.h"
@@ skipping 262 matching lines @@
   return pdfium::CollectionSize<int32_t>(m_arrayGlobalData);
 }
 
 CJS_GlobalData_Element* CJS_GlobalData::GetAt(int index) const {
   if (index < 0 || index >= GetSize())
     return nullptr;
   return m_arrayGlobalData[index].get();
 }
 
 void CJS_GlobalData::LoadGlobalPersistentVariables() {
-  uint8_t* pBuffer = NULL;
+  uint8_t* pBuffer = nullptr;
   int32_t nLength = 0;
 
   LoadFileBuffer(m_sFilePath.c_str(), pBuffer, nLength);
   CRYPT_ArcFourCryptBlock(pBuffer, nLength, JS_RC4KEY, sizeof(JS_RC4KEY));
 
   if (pBuffer) {
     uint8_t* p = pBuffer;
     uint16_t wType = *((uint16_t*)p);
     p += sizeof(uint16_t);
 
@@ skipping 152 matching lines @@
     case JS_GLOBALDATA_TYPE_NULL: {
       uint32_t dwNameLen = (uint32_t)name.GetLength();
       sData.AppendBlock(&dwNameLen, sizeof(uint32_t));
       sData.AppendString(name);
       sData.AppendBlock(&wType, sizeof(uint32_t));
     } break;
     default:
       break;
   }
 }