Remove CPDF_Object::GetConstString and overrides

core/fpdfapi/fpdf_parser/include/cpdf_name.h

 // 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
 
 #ifndef CORE_FPDFAPI_FPDF_PARSER_INCLUDE_CPDF_NAME_H_
 #define CORE_FPDFAPI_FPDF_PARSER_INCLUDE_CPDF_NAME_H_
 
 #include "core/fpdfapi/fpdf_parser/include/cpdf_object.h"
 
 class CPDF_Name : public CPDF_Object {
  public:
   explicit CPDF_Name(const CFX_ByteString& str);
   explicit CPDF_Name(const CFX_ByteStringC& str);
   explicit CPDF_Name(const FX_CHAR* str);
 
   // CPDF_Object.
   Type GetType() const override;
   CPDF_Object* Clone(FX_BOOL bDirect = FALSE) const override;
   CFX_ByteString GetString() const override;
-  CFX_ByteStringC GetConstString() const override;
   CFX_WideString GetUnicodeText() const override;
   void SetString(const CFX_ByteString& str) override;
   bool IsName() const override;
   CPDF_Name* AsName() override;
   const CPDF_Name* AsName() const override;
 
  protected:
   ~CPDF_Name() override;
 
   CFX_ByteString m_Name;
 };
 
 #endif  // CORE_FPDFAPI_FPDF_PARSER_INCLUDE_CPDF_NAME_H_