Get rid of NULLs in core/

core/fxge/ge/fx_ge.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 "core/fxge/include/fx_ge.h"
 
 #include "core/fxge/ge/fx_text_int.h"
 
-static CFX_GEModule* g_pGEModule = NULL;
+static CFX_GEModule* g_pGEModule = nullptr;
 CFX_GEModule::CFX_GEModule(const char** pUserFontPaths) {
-  m_pFontCache = NULL;
-  m_pFontMgr = NULL;
-  m_FTLibrary = NULL;
-  m_pCodecModule = NULL;
-  m_pPlatformData = NULL;
+  m_pFontCache = nullptr;
+  m_pFontMgr = nullptr;
+  m_FTLibrary = nullptr;
+  m_pCodecModule = nullptr;
+  m_pPlatformData = nullptr;
   m_pUserFontPaths = pUserFontPaths;
 }
 CFX_GEModule::~CFX_GEModule() {
   delete m_pFontCache;
-  m_pFontCache = NULL;
+  m_pFontCache = nullptr;
   delete m_pFontMgr;
-  m_pFontMgr = NULL;
+  m_pFontMgr = nullptr;
   DestroyPlatform();
 }
 CFX_GEModule* CFX_GEModule::Get() {
   return g_pGEModule;
 }
 void CFX_GEModule::Create(const char** userFontPaths) {
   g_pGEModule = new CFX_GEModule(userFontPaths);
   g_pGEModule->m_pFontMgr = new CFX_FontMgr;
   g_pGEModule->InitPlatform();
   g_pGEModule->SetTextGamma(2.2f);
 }
 void CFX_GEModule::Use(CFX_GEModule* pModule) {
   g_pGEModule = pModule;
 }
 void CFX_GEModule::Destroy() {
   delete g_pGEModule;
-  g_pGEModule = NULL;
+  g_pGEModule = nullptr;
 }
 CFX_FontCache* CFX_GEModule::GetFontCache() {
   if (!m_pFontCache) {
     m_pFontCache = new CFX_FontCache();
   }
   return m_pFontCache;
 }
 void CFX_GEModule::SetTextGamma(FX_FLOAT gammaValue) {
   gammaValue /= 2.2f;
   int i = 0;
   while (i < 256) {
     m_GammaValue[i] =
         (uint8_t)(FXSYS_pow((FX_FLOAT)i / 255, gammaValue) * 255.0f + 0.5f);
     i++;
   }
 }
 const uint8_t* CFX_GEModule::GetTextGammaTable() {
   return m_GammaValue;
 }