Get rid of memcmp in CFieldTree::Lookup()

core/fpdfdoc/cpdf_interform.cpp

 // Copyright 2016 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 <vector>
 
 #include "core/fpdfapi/fpdf_font/include/cpdf_font.h"
 #include "core/fpdfapi/fpdf_font/include/cpdf_fontencoding.h"
@@ skipping 616 matching lines @@
   delete pNode;
 }
 
 CFieldTree::Node* CFieldTree::Lookup(Node* pParent,
                                      const CFX_WideString& short_name) {
   if (!pParent)
     return nullptr;
 
   for (int i = 0; i < pParent->children.GetSize(); i++) {
     Node* pNode = pParent->children[i];
-    if (pNode->short_name.GetLength() == short_name.GetLength() &&
-        FXSYS_memcmp(pNode->short_name.c_str(), short_name.c_str(),
-                     short_name.GetLength() * sizeof(FX_WCHAR)) == 0) {
+    if (pNode->short_name == short_name)
       return pNode;
-    }
   }
   return nullptr;
 }
 
 void CFieldTree::RemoveAll() {
   for (int i = 0; i < m_Root.children.GetSize(); i++)
     RemoveNode(m_Root.children[i]);
 }
 
 void CFieldTree::SetField(const CFX_WideString& full_name,
@@ skipping 975 matching lines @@
     FDF_ImportField(pField, L"", bNotify);
   }
   if (bNotify && m_pFormNotify)
     m_pFormNotify->AfterFormImportData(this);
   return TRUE;
 }
 
 void CPDF_InterForm::SetFormNotify(IPDF_FormNotify* pNotify) {
   m_pFormNotify = pNotify;
 }