Get rid of NULLs in core/

core/fpdfapi/fpdf_edit/cpdf_pagecontentgenerator.cpp

 // Copyright 2016 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 "core/fpdfapi/fpdf_edit/include/cpdf_pagecontentgenerator.h"
 
 #include "core/fpdfapi/fpdf_edit/include/cpdf_creator.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_image.h"
@@ skipping 29 matching lines @@
   CFX_ByteTextBuf buf;
   CPDF_Dictionary* pPageDict = m_pPage->m_pFormDict;
   for (int i = 0; i < m_pageObjects.GetSize(); ++i) {
     CPDF_PageObject* pPageObj = m_pageObjects[i];
     if (!pPageObj || !pPageObj->IsImage()) {
       continue;
     }
     ProcessImage(buf, pPageObj->AsImage());
   }
   CPDF_Object* pContent =
-      pPageDict ? pPageDict->GetDirectObjectBy("Contents") : NULL;
+      pPageDict ? pPageDict->GetDirectObjectBy("Contents") : nullptr;
   if (pContent) {
     pPageDict->RemoveAt("Contents");
   }
-  CPDF_Stream* pStream = new CPDF_Stream(NULL, 0, NULL);
+  CPDF_Stream* pStream = new CPDF_Stream(nullptr, 0, nullptr);
   pStream->SetData(buf.GetBuffer(), buf.GetLength(), FALSE, FALSE);
   m_pDocument->AddIndirectObject(pStream);
   pPageDict->SetAtReference("Contents", m_pDocument, pStream->GetObjNum());
 }
 CFX_ByteString CPDF_PageContentGenerator::RealizeResource(
     CPDF_Object* pResourceObj,
     const CFX_ByteString& bsType) {
   if (!m_pPage->m_pResources) {
     m_pPage->m_pResources = new CPDF_Dictionary;
     int objnum = m_pDocument->AddIndirectObject(m_pPage->m_pResources);
@@ skipping 36 matching lines @@
     buf << "/" << PDF_NameEncode(name) << " Do Q\n";
   }
 }
 void CPDF_PageContentGenerator::ProcessForm(CFX_ByteTextBuf& buf,
                                             const uint8_t* data,
                                             uint32_t size,
                                             CFX_Matrix& matrix) {
   if (!data || !size) {
     return;
   }
-  CPDF_Stream* pStream = new CPDF_Stream(NULL, 0, NULL);
+  CPDF_Stream* pStream = new CPDF_Stream(nullptr, 0, nullptr);
   CPDF_Dictionary* pFormDict = new CPDF_Dictionary;
   pFormDict->SetAtName("Type", "XObject");
   pFormDict->SetAtName("Subtype", "Form");
   CFX_FloatRect bbox = m_pPage->GetPageBBox();
   matrix.TransformRect(bbox);
   pFormDict->SetAtRect("BBox", bbox);
   pStream->InitStream((uint8_t*)data, size, pFormDict);
   buf << "q " << matrix << " cm ";
   CFX_ByteString name = RealizeResource(pStream, "XObject");
   buf << "/" << PDF_NameEncode(name) << " Do Q\n";
 }
 void CPDF_PageContentGenerator::TransformContent(CFX_Matrix& matrix) {
   CPDF_Dictionary* pDict = m_pPage->m_pFormDict;
-  CPDF_Object* pContent = pDict ? pDict->GetDirectObjectBy("Contents") : NULL;
+  CPDF_Object* pContent =
+      pDict ? pDict->GetDirectObjectBy("Contents") : nullptr;
   if (!pContent)
     return;
 
   CFX_ByteTextBuf buf;
   if (CPDF_Array* pArray = pContent->AsArray()) {
     size_t iCount = pArray->GetCount();
     CPDF_StreamAcc** pContentArray = FX_Alloc(CPDF_StreamAcc*, iCount);
     size_t size = 0;
     for (size_t i = 0; i < iCount; ++i) {
       pContent = pArray->GetObjectAt(i);
@@ skipping 16 matching lines @@
       delete pContentArray[i];
     }
     ProcessForm(buf, pBuf, size, matrix);
     FX_Free(pBuf);
     FX_Free(pContentArray);
   } else if (CPDF_Stream* pStream = pContent->AsStream()) {
     CPDF_StreamAcc contentStream;
     contentStream.LoadAllData(pStream);
     ProcessForm(buf, contentStream.GetData(), contentStream.GetSize(), matrix);
   }
-  CPDF_Stream* pStream = new CPDF_Stream(NULL, 0, NULL);
+  CPDF_Stream* pStream = new CPDF_Stream(nullptr, 0, nullptr);
   pStream->SetData(buf.GetBuffer(), buf.GetLength(), FALSE, FALSE);
   m_pDocument->AddIndirectObject(pStream);
   m_pPage->m_pFormDict->SetAtReference("Contents", m_pDocument,
                                        pStream->GetObjNum());
 }