Get rid of NULLs in fpdfsdk/

fpdfsdk/javascript/Document.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/Document.h"
 
 #include <vector>
 
@@ skipping 129 matching lines @@
 
 void CJS_Document::InitInstance(IJS_Runtime* pIRuntime) {
   CJS_Runtime* pRuntime = static_cast<CJS_Runtime*>(pIRuntime);
   Document* pDoc = static_cast<Document*>(GetEmbedObject());
   pDoc->AttachDoc(pRuntime->GetReaderDocument());
   pDoc->SetIsolate(pRuntime->GetIsolate());
 }
 
 Document::Document(CJS_Object* pJSObject)
     : CJS_EmbedObj(pJSObject),
-      m_isolate(NULL),
-      m_pDocument(NULL),
+      m_isolate(nullptr),
+      m_pDocument(nullptr),
       m_cwBaseURL(L""),
       m_bDelay(FALSE) {}
 
 Document::~Document() {
 }
 
 // the total number of fileds in document.
 FX_BOOL Document::numFields(IJS_Context* cc,
                             CJS_PropValue& vp,
                             CFX_WideString& sError) {
@@ skipping 546 matching lines @@
     cSubject =
         CJS_Value(pRuntime, pValue, GET_VALUE_TYPE(pValue)).ToCFXWideString();
 
     pValue = FXJS_GetObjectElement(isolate, pObj, L"cMsg");
     cMsg =
         CJS_Value(pRuntime, pValue, GET_VALUE_TYPE(pValue)).ToCFXWideString();
   }
 
   pRuntime->BeginBlock();
   CPDFDoc_Environment* pEnv = pRuntime->GetReaderApp();
-  pEnv->JS_docmailForm(NULL, 0, bUI, cTo.c_str(), cSubject.c_str(), cCc.c_str(),
-                       cBcc.c_str(), cMsg.c_str());
+  pEnv->JS_docmailForm(nullptr, 0, bUI, cTo.c_str(), cSubject.c_str(),
+                       cCc.c_str(), cBcc.c_str(), cMsg.c_str());
   pRuntime->EndBlock();
 
   return TRUE;
 }
 
 FX_BOOL Document::author(IJS_Context* cc,
                          CJS_PropValue& vp,
                          CFX_WideString& sError) {
   CPDF_Dictionary* pDictionary = m_pDocument->GetPDFDocument()->GetInfo();
   if (!pDictionary)
@@ skipping 852 matching lines @@
     }
   }
 
   for (const auto& pData : DelayDataForFieldAndControlIndex)
     Field::DoDelay(m_pDocument, pData.get());
 }
 
 CJS_Document* Document::GetCJSDoc() const {
   return static_cast<CJS_Document*>(m_pJSObject);
 }