Remove an extra "const" in fpdf_objects.

core/include/fpdfapi/fpdf_objects.h

 // 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
 
 #ifndef CORE_INCLUDE_FPDFAPI_FPDF_OBJECTS_H_
 #define CORE_INCLUDE_FPDFAPI_FPDF_OBJECTS_H_
 
 #include <map>
@@ skipping 84 matching lines @@
   const CPDF_Stream* AsStream() const;
   CPDF_String* AsString();
   const CPDF_String* AsString() const;
 
  protected:
   explicit CPDF_Object(FX_DWORD type)
       : m_Type(type), m_ObjNum(0), m_GenNum(0) {}
   ~CPDF_Object() {}
   void Destroy();
 
-  const CPDF_Object* const GetBasicObject() const;
+  const CPDF_Object* GetBasicObject() const;
 
   FX_DWORD m_Type;
   FX_DWORD m_ObjNum;
   FX_DWORD m_GenNum;
 
   friend class CPDF_IndirectObjectHolder;
   friend class CPDF_Parser;
   friend class CPDF_SyntaxParser;
 
  private:
@@ skipping 466 matching lines @@
   iterator end() { return m_IndirectObjs.end(); }
   const_iterator end() const { return m_IndirectObjs.end(); }
 
  protected:
   CPDF_Parser* m_pParser;
   FX_DWORD m_LastObjNum;
   std::map<FX_DWORD, CPDF_Object*> m_IndirectObjs;
 };
 
 #endif  // CORE_INCLUDE_FPDFAPI_FPDF_OBJECTS_H_