Get rid of NULLs in core/

core/fpdfapi/fpdf_page/include/cpdf_image.h

 // 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
 
 #ifndef CORE_FPDFAPI_FPDF_PAGE_INCLUDE_CPDF_IMAGE_H_
 #define CORE_FPDFAPI_FPDF_PAGE_INCLUDE_CPDF_IMAGE_H_
 
 #include "core/fpdfapi/fpdf_parser/include/cpdf_stream.h"
@@ skipping 21 matching lines @@
 
   FX_BOOL LoadImageF(CPDF_Stream* pImageStream, FX_BOOL bInline);
 
   void Release();
 
   CPDF_Image* Clone();
 
   CPDF_Dictionary* GetInlineDict() const { return m_pInlineDict; }
   CPDF_Stream* GetStream() const { return m_pStream; }
   CPDF_Dictionary* GetDict() const {
-    return m_pStream ? m_pStream->GetDict() : NULL;
+    return m_pStream ? m_pStream->GetDict() : nullptr;
   }
   CPDF_Dictionary* GetOC() const { return m_pOC; }
   CPDF_Document* GetDocument() const { return m_pDocument; }
 
   int32_t GetPixelHeight() const { return m_Height; }
   int32_t GetPixelWidth() const { return m_Width; }
 
   FX_BOOL IsInline() { return m_bInline; }
   FX_BOOL IsMask() const { return m_bIsMask; }
   FX_BOOL IsInterpol() const { return m_bInterpolate; }
 
-  CFX_DIBSource* LoadDIBSource(CFX_DIBSource** ppMask = NULL,
-                               uint32_t* pMatteColor = NULL,
+  CFX_DIBSource* LoadDIBSource(CFX_DIBSource** ppMask = nullptr,
+                               uint32_t* pMatteColor = nullptr,
                                FX_BOOL bStdCS = FALSE,
                                uint32_t GroupFamily = 0,
                                FX_BOOL bLoadMask = FALSE) const;
 
   void SetInlineDict(CPDF_Dictionary* pDict) { m_pInlineDict = pDict; }
   void SetImage(const CFX_DIBitmap* pDIBitmap, int32_t iCompress);
   void SetJpegImage(uint8_t* pImageData, uint32_t size);
   void SetJpegImage(IFX_FileRead* pFile);
 
   void ResetCache(CPDF_Page* pPage, const CFX_DIBitmap* pDIBitmap);
@@ skipping 19 matching lines @@
   CPDF_Dictionary* m_pInlineDict;
   int32_t m_Height;
   int32_t m_Width;
   FX_BOOL m_bIsMask;
   FX_BOOL m_bInterpolate;
   CPDF_Document* m_pDocument;
   CPDF_Dictionary* m_pOC;
 };
 
 #endif  // CORE_FPDFAPI_FPDF_PAGE_INCLUDE_CPDF_IMAGE_H_