Remove CPDF_Object::GetConstString and overrides

core/fpdfapi/fpdf_parser/cpdf_array.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 "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 
 #include "core/fpdfapi/fpdf_parser/include/cpdf_name.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_number.h"
@@ skipping 74 matching lines @@
     return nullptr;
   return m_Objects.at(i)->GetDirect();
 }
 
 CFX_ByteString CPDF_Array::GetStringAt(size_t i) const {
   if (i >= m_Objects.size())
     return CFX_ByteString();
   return m_Objects.at(i)->GetString();
 }
 
-CFX_ByteStringC CPDF_Array::GetConstStringAt(size_t i) const {
-  if (i >= m_Objects.size())
-    return CFX_ByteStringC();
-  return m_Objects.at(i)->GetConstString();
-}
-
 int CPDF_Array::GetIntegerAt(size_t i) const {
   if (i >= m_Objects.size())
     return 0;
   return m_Objects.at(i)->GetInteger();
 }
 
 FX_FLOAT CPDF_Array::GetNumberAt(size_t i) const {
   if (i >= m_Objects.size())
     return 0;
   return m_Objects.at(i)->GetNumber();
@@ skipping 92 matching lines @@
   ASSERT(IsArray());
   CPDF_Number* pNumber = new CPDF_Number(f);
   Add(pNumber);
 }
 
 void CPDF_Array::AddReference(CPDF_IndirectObjectHolder* pDoc,
                               uint32_t objnum) {
   ASSERT(IsArray());
   Add(new CPDF_Reference(pDoc, objnum));
 }