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

fpdfsdk/src/pdfwindow/PWL_FontMap.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 "fpdfsdk/include/pdfwindow/PDFWindow.h"
 #include "fpdfsdk/include/pdfwindow/PWL_FontMap.h"
 #include "fpdfsdk/include/pdfwindow/PWL_Wnd.h"
 
 #define DEFAULT_FONT_NAME "Helvetica"
 
 /* ------------------------------ CPWL_FontMap ------------------------------ */
 
 CPWL_FontMap::CPWL_FontMap(IFX_SystemHandler* pSystemHandler)
     : m_pPDFDoc(NULL), m_pSystemHandler(pSystemHandler) {
-  ASSERT(m_pSystemHandler != NULL);
+  ASSERT(m_pSystemHandler);
 }
 
 CPWL_FontMap::~CPWL_FontMap() {
   delete m_pPDFDoc;
   m_pPDFDoc = NULL;
 
   Empty();
 }
 
 void CPWL_FontMap::SetSystemHandler(IFX_SystemHandler* pSystemHandler) {
@@ skipping 480 matching lines @@
 
 CPWL_DocFontMap::CPWL_DocFontMap(IFX_SystemHandler* pSystemHandler,
                                  CPDF_Document* pAttachedDoc)
     : CPWL_FontMap(pSystemHandler), m_pAttachedDoc(pAttachedDoc) {}
 
 CPWL_DocFontMap::~CPWL_DocFontMap() {}
 
 CPDF_Document* CPWL_DocFontMap::GetDocument() {
   return m_pAttachedDoc;
 }