Get rid of NULLs in core/

core/fxge/include/fx_ge.h

 // 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
 
 #ifndef CORE_FXGE_INCLUDE_FX_GE_H_
 #define CORE_FXGE_INCLUDE_FX_GE_H_
 
 #include "core/fxge/include/fx_dib.h"
@@ skipping 406 matching lines @@
 
  protected:
   bool m_bOwnedBitmap;
 };
 
 class IFX_RenderDeviceDriver {
  public:
   static IFX_RenderDeviceDriver* CreateFxgeDriver(
       CFX_DIBitmap* pBitmap,
       FX_BOOL bRgbByteOrder = FALSE,
-      CFX_DIBitmap* pOriDevice = NULL,
+      CFX_DIBitmap* pOriDevice = nullptr,
       FX_BOOL bGroupKnockout = FALSE);
 
   virtual ~IFX_RenderDeviceDriver() {}
 
   virtual int GetDeviceCaps(int caps_id) = 0;
 
   virtual CFX_Matrix GetCTM() const { return CFX_Matrix(); }
 
   virtual FX_BOOL StartRendering() { return TRUE; }
 
@@ skipping 13 matching lines @@
     return FALSE;
   }
 
   virtual FX_BOOL DrawPath(const CFX_PathData* pPathData,
                            const CFX_Matrix* pObject2Device,
                            const CFX_GraphStateData* pGraphState,
                            uint32_t fill_color,
                            uint32_t stroke_color,
                            int fill_mode,
                            int alpha_flag = 0,
-                           void* pIccTransform = NULL,
+                           void* pIccTransform = nullptr,
                            int blend_type = FXDIB_BLEND_NORMAL) = 0;
 
   virtual FX_BOOL SetPixel(int x,
                            int y,
                            uint32_t color,
                            int alpha_flag = 0,
-                           void* pIccTransform = NULL) {
+                           void* pIccTransform = nullptr) {
     return FALSE;
   }
 
   virtual FX_BOOL FillRect(const FX_RECT* pRect,
                            uint32_t fill_color,
                            int alpha_flag = 0,
-                           void* pIccTransform = NULL,
+                           void* pIccTransform = nullptr,
                            int blend_type = FXDIB_BLEND_NORMAL) {
     return FALSE;
   }
 
   virtual FX_BOOL DrawCosmeticLine(FX_FLOAT x1,
                                    FX_FLOAT y1,
                                    FX_FLOAT x2,
                                    FX_FLOAT y2,
                                    uint32_t color,
                                    int alpha_flag = 0,
-                                   void* pIccTransform = NULL,
+                                   void* pIccTransform = nullptr,
                                    int blend_type = FXDIB_BLEND_NORMAL) {
     return FALSE;
   }
 
   virtual FX_BOOL GetClipBox(FX_RECT* pRect) = 0;
 
   virtual FX_BOOL GetDIBits(CFX_DIBitmap* pBitmap,
                             int left,
                             int top,
-                            void* pIccTransform = NULL,
+                            void* pIccTransform = nullptr,
                             FX_BOOL bDEdge = FALSE) {
     return FALSE;
   }
-  virtual CFX_DIBitmap* GetBackDrop() { return NULL; }
+  virtual CFX_DIBitmap* GetBackDrop() { return nullptr; }
 
   virtual FX_BOOL SetDIBits(const CFX_DIBSource* pBitmap,
                             uint32_t color,
                             const FX_RECT* pSrcRect,
                             int dest_left,
                             int dest_top,
                             int blend_type,
                             int alpha_flag = 0,
-                            void* pIccTransform = NULL) = 0;
+                            void* pIccTransform = nullptr) = 0;
 
   virtual FX_BOOL StretchDIBits(const CFX_DIBSource* pBitmap,
                                 uint32_t color,
                                 int dest_left,
                                 int dest_top,
                                 int dest_width,
                                 int dest_height,
                                 const FX_RECT* pClipRect,
                                 uint32_t flags,
                                 int alpha_flag = 0,
-                                void* pIccTransform = NULL,
+                                void* pIccTransform = nullptr,
                                 int blend_type = FXDIB_BLEND_NORMAL) = 0;
 
   virtual FX_BOOL StartDIBits(const CFX_DIBSource* pBitmap,
                               int bitmap_alpha,
                               uint32_t color,
                               const CFX_Matrix* pMatrix,
                               uint32_t flags,
                               void*& handle,
                               int alpha_flag = 0,
-                              void* pIccTransform = NULL,
+                              void* pIccTransform = nullptr,
                               int blend_type = FXDIB_BLEND_NORMAL) = 0;
 
   virtual FX_BOOL ContinueDIBits(void* handle, IFX_Pause* pPause) {
     return FALSE;
   }
 
   virtual void CancelDIBits(void* handle) {}
 
   virtual FX_BOOL DrawDeviceText(int nChars,
                                  const FXTEXT_CHARPOS* pCharPos,
                                  CFX_Font* pFont,
                                  CFX_FontCache* pCache,
                                  const CFX_Matrix* pObject2Device,
                                  FX_FLOAT font_size,
                                  uint32_t color,
                                  int alpha_flag = 0,
-                                 void* pIccTransform = NULL) {
+                                 void* pIccTransform = nullptr) {
     return FALSE;
   }
 
-  virtual void* GetPlatformSurface() const { return NULL; }
+  virtual void* GetPlatformSurface() const { return nullptr; }
   virtual int GetDriverType() const { return 0; }
   virtual void ClearDriver() {}
 
   virtual FX_BOOL DrawShading(const CPDF_ShadingPattern* pPattern,
                               const CFX_Matrix* pMatrix,
                               const FX_RECT& clip_rect,
                               int alpha,
                               FX_BOOL bAlphaMode) {
     return false;
   }
 };
 
 #endif  // CORE_FXGE_INCLUDE_FX_GE_H_