Fix virtual/override/final usage in Source/platform/.

Source/platform/UserGestureIndicator.cpp

 /*
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 26 matching lines @@
 // User gestures timeout in 1 second.
 const double userGestureTimeout = 1.0;
 
 // For out of process tokens we allow a 10 second delay.
 const double userGestureOutOfProcessTimeout = 10.0;
 
 class GestureToken : public UserGestureToken {
 public:
     static PassRefPtr<UserGestureToken> create() { return adoptRef(new GestureToken); }
 
-    virtual ~GestureToken() { }
-    virtual bool hasGestures() const override
+    ~GestureToken() override {}
+    bool hasGestures() const override
     {
         // Do not enforce timeouts for gestures which spawned javascript prompts.
         if (m_consumableGestures < 1 || (WTF::currentTime() - m_timestamp > (m_outOfProcess ? userGestureOutOfProcessTimeout : userGestureTimeout) && !m_javascriptPrompt))
             return false;
         return true;
     }
 
     void addGesture()
     {
         m_consumableGestures++;
         m_timestamp = WTF::currentTime();
     }
 
     void resetTimestamp()
     {
         m_timestamp = WTF::currentTime();
     }
 
     bool consumeGesture()
     {
         if (!m_consumableGestures)
             return false;
         m_consumableGestures--;
         return true;
     }
 
-    virtual void setOutOfProcess() override
+    void setOutOfProcess() override
     {
         if (WTF::currentTime() - m_timestamp > userGestureTimeout)
             return;
         if (hasGestures())
             m_outOfProcess = true;
     }
 
-    virtual void setJavascriptPrompt() override
+    void setJavascriptPrompt() override
     {
         if (WTF::currentTime() - m_timestamp > userGestureTimeout)
             return;
         if (hasGestures())
             m_javascriptPrompt = true;
     }
 
 private:
     GestureToken()
         : m_consumableGestures(0)
@@ skipping 115 matching lines @@
 }
 
 bool UserGestureIndicator::processedUserGestureSinceLoad()
 {
     if (!isMainThread())
         return false;
     return s_processedUserGestureSinceLoad;
 }
 
 }