Remove CPDF_Object::GetConstString and overrides

core/fpdfapi/fpdf_parser/cpdf_dictionary.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_dictionary.h"
 
 #include "core/fpdfapi/fpdf_parser/cpdf_boolean.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
@@ skipping 50 matching lines @@
     const CFX_ByteStringC& key) const {
   CPDF_Object* p = GetObjectBy(key);
   return p ? p->GetDirect() : nullptr;
 }
 
 CFX_ByteString CPDF_Dictionary::GetStringBy(const CFX_ByteStringC& key) const {
   CPDF_Object* p = GetObjectBy(key);
   return p ? p->GetString() : CFX_ByteString();
 }
 
-CFX_ByteStringC CPDF_Dictionary::GetConstStringBy(
-    const CFX_ByteStringC& key) const {
-  CPDF_Object* p = GetObjectBy(key);
-  return p ? p->GetConstString() : CFX_ByteStringC();
-}
-
 CFX_WideString CPDF_Dictionary::GetUnicodeTextBy(
     const CFX_ByteStringC& key) const {
   CPDF_Object* p = GetObjectBy(key);
   if (CPDF_Reference* pRef = ToReference(p))
     p = pRef->GetDirect();
   return p ? p->GetUnicodeText() : CFX_WideString();
 }
 
 CFX_ByteString CPDF_Dictionary::GetStringBy(const CFX_ByteStringC& key,
                                             const CFX_ByteStringC& def) const {
   CPDF_Object* p = GetObjectBy(key);
   return p ? p->GetString() : CFX_ByteString(def);
 }
 
-CFX_ByteStringC CPDF_Dictionary::GetConstStringBy(
-    const CFX_ByteStringC& key,
-    const CFX_ByteStringC& def) const {
-  CPDF_Object* p = GetObjectBy(key);
-  return p ? p->GetConstString() : CFX_ByteStringC(def);
-}
-
 int CPDF_Dictionary::GetIntegerBy(const CFX_ByteStringC& key) const {
   CPDF_Object* p = GetObjectBy(key);
   return p ? p->GetInteger() : 0;
 }
 
 int CPDF_Dictionary::GetIntegerBy(const CFX_ByteStringC& key, int def) const {
   CPDF_Object* p = GetObjectBy(key);
   return p ? p->GetInteger() : def;
 }
 
@@ skipping 154 matching lines @@
                                   const CFX_Matrix& matrix) {
   CPDF_Array* pArray = new CPDF_Array;
   pArray->AddNumber(matrix.a);
   pArray->AddNumber(matrix.b);
   pArray->AddNumber(matrix.c);
   pArray->AddNumber(matrix.d);
   pArray->AddNumber(matrix.e);
   pArray->AddNumber(matrix.f);
   SetAt(key, pArray);
 }