Remove more strcmp/memcmp usage.

fpdfsdk/fpdfppo.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 "public/fpdf_ppo.h"
 
 #include <map>
 #include <memory>
@@ skipping 205 matching lines @@
       pReference->SetRef(pDoc, newobjnum);
       break;
     }
     case CPDF_Object::DICTIONARY: {
       CPDF_Dictionary* pDict = pObj->AsDictionary();
       auto it = pDict->begin();
       while (it != pDict->end()) {
         const CFX_ByteString& key = it->first;
         CPDF_Object* pNextObj = it->second;
         ++it;
-        if (!FXSYS_strcmp(key.c_str(), "Parent") ||
-            !FXSYS_strcmp(key.c_str(), "Prev") ||
-            !FXSYS_strcmp(key.c_str(), "First")) {
+        if (key == "Parent" || key == "Prev" || key == "First")
           continue;
-        }
-        if (pNextObj) {
-          if (!UpdateReference(pNextObj, pDoc, pObjNumberMap))
-            pDict->RemoveAt(key);
-        } else {
+        if (!pNextObj)
           return FALSE;
-        }
+        if (!UpdateReference(pNextObj, pDoc, pObjNumberMap))
+          pDict->RemoveAt(key);
       }
       break;
     }
     case CPDF_Object::ARRAY: {
       CPDF_Array* pArray = pObj->AsArray();
       for (size_t i = 0; i < pArray->GetCount(); ++i) {
         CPDF_Object* pNextObj = pArray->GetObjectAt(i);
         if (!pNextObj)
           return FALSE;
         if (!UpdateReference(pNextObj, pDoc, pObjNumberMap))
@@ skipping 156 matching lines @@
   if (!pSrcDict)
     return FALSE;
 
   CPDF_Dictionary* pDstDict = pDstDoc->GetRoot();
   if (!pDstDict)
     return FALSE;
 
   pDstDict->SetAt("ViewerPreferences", pSrcDict->CloneDirectObject());
   return TRUE;
 }