Use override in more classes in fpdfsdk/

fpdfsdk/include/javascript/console.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 FPDFSDK_INCLUDE_JAVASCRIPT_CONSOLE_H_
 #define FPDFSDK_INCLUDE_JAVASCRIPT_CONSOLE_H_
 
 #include "JS_Define.h"
 
 class console : public CJS_EmbedObj {
  public:
   console(CJS_Object* pJSObject);
-  virtual ~console(void);
+  ~console() override;
 
  public:
   FX_BOOL clear(IFXJS_Context* cc,
                 const CJS_Parameters& params,
                 CJS_Value& vRet,
                 CFX_WideString& sError);
   FX_BOOL hide(IFXJS_Context* cc,
                const CJS_Parameters& params,
                CJS_Value& vRet,
                CFX_WideString& sError);
   FX_BOOL println(IFXJS_Context* cc,
                   const CJS_Parameters& params,
                   CJS_Value& vRet,
                   CFX_WideString& sError);
   FX_BOOL show(IFXJS_Context* cc,
                const CJS_Parameters& params,
                CJS_Value& vRet,
                CFX_WideString& sError);
 };
 
 class CJS_Console : public CJS_Object {
  public:
-  CJS_Console(JSFXObject pObject) : CJS_Object(pObject){};
-  virtual ~CJS_Console(void){};
+  CJS_Console(JSFXObject pObject) : CJS_Object(pObject) {}
+  ~CJS_Console() override {}
 
   DECLARE_JS_CLASS(CJS_Console);
 
   JS_STATIC_METHOD(clear, console);
   JS_STATIC_METHOD(hide, console);
   JS_STATIC_METHOD(println, console);
   JS_STATIC_METHOD(show, console);
 };
 
 #endif  // FPDFSDK_INCLUDE_JAVASCRIPT_CONSOLE_H_