Update inspector classes to use OVERRIDE / FINAL when needed

Source/core/inspector/InspectorMemoryAgent.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 23 matching lines @@
 #include "InspectorFrontend.h"
 #include "core/inspector/InspectorBaseAgent.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace WebCore {
 
 class InstrumentingAgents;
 
 typedef String ErrorString;
 
-class InspectorMemoryAgent : public InspectorBaseAgent<InspectorMemoryAgent>, public InspectorBackendDispatcher::MemoryCommandHandler {
+class InspectorMemoryAgent FINAL : public InspectorBaseAgent<InspectorMemoryAgent>, public InspectorBackendDispatcher::MemoryCommandHandler {
     WTF_MAKE_NONCOPYABLE(InspectorMemoryAgent);
 public:
     static PassOwnPtr<InspectorMemoryAgent> create(InstrumentingAgents* instrumentingAgents, InspectorCompositeState* state)
     {
         return adoptPtr(new InspectorMemoryAgent(instrumentingAgents, state));
     }
     virtual ~InspectorMemoryAgent();
 
-    virtual void getDOMCounters(ErrorString*, int* documents, int* nodes, int* jsEventListeners);
+    virtual void getDOMCounters(ErrorString*, int* documents, int* nodes, int* jsEventListeners) OVERRIDE;
 
-    virtual void setFrontend(InspectorFrontend*);
-    virtual void clearFrontend();
+    virtual void setFrontend(InspectorFrontend*) OVERRIDE;
+    virtual void clearFrontend() OVERRIDE;
 
 private:
     InspectorMemoryAgent(InstrumentingAgents*, InspectorCompositeState*);
 
     InspectorFrontend::Memory* m_frontend;
 };
 
 } // namespace WebCore
 
 #endif // !defined(InspectorMemoryAgent_h)