Use override in more classes in fpdfsdk/

fpdfsdk/src/javascript/event.cpp

 // 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
 
 #include "../../include/javascript/JavaScript.h"
 #include "../../include/javascript/IJavaScript.h"
 #include "../../include/javascript/JS_Define.h"
 #include "../../include/javascript/JS_Object.h"
@@ skipping 32 matching lines @@
 JS_STATIC_PROP_ENTRY(willCommit)
 END_JS_STATIC_PROP()
 
 BEGIN_JS_STATIC_METHOD(CJS_Event)
 END_JS_STATIC_METHOD()
 
 IMPLEMENT_JS_CLASS(CJS_Event, event)
 
 event::event(CJS_Object* pJsObject) : CJS_EmbedObj(pJsObject) {}
 
-event::~event(void) {}
+event::~event() {
+}
 
 FX_BOOL event::change(IFXJS_Context* cc,
                       CJS_PropValue& vp,
                       CFX_WideString& sError) {
   CJS_Context* pContext = (CJS_Context*)cc;
   ASSERT(pContext != NULL);
   CJS_EventHandler* pEvent = pContext->GetEventHandler();
   ASSERT(pEvent != NULL);
 
   CFX_WideString& wChange = pEvent->Change();
@@ skipping 306 matching lines @@
   ASSERT(pContext != NULL);
   CJS_EventHandler* pEvent = pContext->GetEventHandler();
   ASSERT(pEvent != NULL);
 
   if (pEvent->WillCommit())
     vp << TRUE;
   else
     vp << FALSE;
   return TRUE;
 }