Get rid of most instance of 'foo != NULL'

core/src/fpdfdoc/doc_ap.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/include/fpdfdoc/fpdf_ap.h"
 #include "core/include/fpdfdoc/fpdf_doc.h"
 #include "core/include/fpdfdoc/fpdf_vt.h"
 #include "doc_utils.h"
@@ skipping 105 matching lines @@
     case 1:
       if (!m_pSysFont) {
         GetAnnotSysPDFFont(m_pDocument, m_pResDict, m_pSysFont,
                            m_sSysFontAlias);
       }
       return m_sSysFontAlias;
   }
   return "";
 }
 CPVT_Provider::CPVT_Provider(IPVT_FontMap* pFontMap) : m_pFontMap(pFontMap) {
-  ASSERT(m_pFontMap != NULL);
+  ASSERT(m_pFontMap);
 }
 CPVT_Provider::~CPVT_Provider() {}
 int32_t CPVT_Provider::GetCharWidth(int32_t nFontIndex,
                                     FX_WORD word,
                                     int32_t nWordStyle) {
   if (CPDF_Font* pPDFFont = m_pFontMap->GetPDFFont(nFontIndex)) {
     FX_DWORD charcode = pPDFFont->CharCodeFromUnicode(word);
     if (charcode != CPDF_Font::kInvalidCharCode) {
       return pPDFFont->GetCharWidthF(charcode);
     }
@@ skipping 788 matching lines @@
                    << "\n";
       break;
     case CT_CMYK:
       sColorStream << color.fColor1 << " " << color.fColor2 << " "
                    << color.fColor3 << " " << color.fColor4 << " "
                    << (bFillOrStroke ? "k" : "K") << "\n";
       break;
   }
   return sColorStream.GetByteString();
 }