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

fpdfsdk/src/pdfwindow/PWL_Utils.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_Icon.h"
 #include "fpdfsdk/include/pdfwindow/PWL_Utils.h"
 #include "fpdfsdk/include/pdfwindow/PWL_Wnd.h"
@@ skipping 510 matching lines @@
   }
 
   return sRet.GetByteString();
 }
 
 CFX_ByteString CPWL_Utils::GetSpellCheckAppStream(
     IFX_Edit* pEdit,
     IPWL_SpellCheck* pSpellCheck,
     const CPDF_Point& ptOffset,
     const CPVT_WordRange* pRange) {
-  ASSERT(pEdit != NULL);
-  ASSERT(pSpellCheck != NULL);
-
   CFX_ByteTextBuf sRet;
 
   if (pRange && pRange->IsExist()) {
     if (IFX_Edit_Iterator* pIterator = pEdit->GetIterator()) {
       pIterator->SetAt(pRange->BeginPos);
 
       FX_BOOL bLatinWord = FALSE;
       CPVT_WordPlace wpWordStart;
       CFX_ByteString sWord;
 
@@ skipping 3160 matching lines @@
           break;
         case COLORTYPE_RGB:
           CPWL_Utils::ConvertCMYK2RGB(fColor1, fColor2, fColor3, fColor4,
                                       fColor1, fColor2, fColor3);
           break;
       }
       break;
   }
   nColorType = other_nColorType;
 }