Get rid of NULLs in core/

core/fpdfapi/fpdf_render/cpdf_pagerendercache.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_RENDER_CPDF_PAGERENDERCACHE_H_
 #define CORE_FPDFAPI_FPDF_RENDER_CPDF_PAGERENDERCACHE_H_
 
 #include <map>
@@ skipping 23 matching lines @@
   uint32_t GetTimeCount() const { return m_nTimeCount; }
   void SetTimeCount(uint32_t dwTimeCount) { m_nTimeCount = dwTimeCount; }
 
   void GetCachedBitmap(CPDF_Stream* pStream,
                        CFX_DIBSource*& pBitmap,
                        CFX_DIBSource*& pMask,
                        uint32_t& MatteColor,
                        FX_BOOL bStdCS = FALSE,
                        uint32_t GroupFamily = 0,
                        FX_BOOL bLoadMask = FALSE,
-                       CPDF_RenderStatus* pRenderStatus = NULL,
+                       CPDF_RenderStatus* pRenderStatus = nullptr,
                        int32_t downsampleWidth = 0,
                        int32_t downsampleHeight = 0);
 
   void ResetBitmap(CPDF_Stream* pStream, const CFX_DIBitmap* pBitmap);
   void ClearImageCacheEntry(CPDF_Stream* pStream);
   CPDF_Page* GetPage() const { return m_pPage; }
   CPDF_ImageCacheEntry* GetCurImageCacheEntry() const {
     return m_pCurImageCacheEntry;
   }
 
   FX_BOOL StartGetCachedBitmap(CPDF_Stream* pStream,
                                FX_BOOL bStdCS = FALSE,
                                uint32_t GroupFamily = 0,
                                FX_BOOL bLoadMask = FALSE,
-                               CPDF_RenderStatus* pRenderStatus = NULL,
+                               CPDF_RenderStatus* pRenderStatus = nullptr,
                                int32_t downsampleWidth = 0,
                                int32_t downsampleHeight = 0);
 
   FX_BOOL Continue(IFX_Pause* pPause);
 
  protected:
   friend class CPDF_Page;
 
   CPDF_Page* const m_pPage;
   CPDF_ImageCacheEntry* m_pCurImageCacheEntry;
   std::map<CPDF_Stream*, CPDF_ImageCacheEntry*> m_ImageCache;
   uint32_t m_nTimeCount;
   uint32_t m_nCacheSize;
   FX_BOOL m_bCurFindCache;
 };
 
 #endif  // CORE_FPDFAPI_FPDF_RENDER_CPDF_PAGERENDERCACHE_H_