Devirtualize several inspector classes destructors

Source/core/inspector/InspectorState.h

 /*
  * Copyright (C) 2011 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 32 matching lines @@
 class InspectorStateUpdateListener {
 public:
     virtual ~InspectorStateUpdateListener() { }
     virtual void inspectorStateUpdated() = 0;
 };
 
 class InspectorState {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     InspectorState(InspectorStateUpdateListener*, PassRefPtr<JSONObject>);
-    virtual ~InspectorState() {}
 
     void loadFromCookie(const String& inspectorStateCookie);
 
     void mute();
     void unmute();
 
     bool getBoolean(const String& propertyName);
     String getString(const String& propertyName);
     long getLong(const String& propertyName);
     long getLong(const String& propertyName, long defaultValue);
@@ skipping 45 matching lines @@
 
     InspectorStateClient* m_client;
     RefPtr<JSONObject> m_stateObject;
     bool m_isMuted;
     InspectorStateMap m_inspectorStateMap;
 };
 
 } // namespace WebCore
 
 #endif // !defined(InspectorState_h)