Fix virtual/override/final usage in the rest of Source/core/.

Source/core/inspector/InspectorDOMAgent.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * 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
@@ skipping 2093 matching lines @@
         if (node && node->document().frame() && node->document().frame()->instrumentingAgents() == m_pageAgent->inspectedFrame()->instrumentingAgents())
             result->addItem(pushNodePathToFrontend(node));
         else
             result->addItem(0);
     }
 }
 
 class InspectableNode final : public InjectedScriptHost::InspectableObject {
 public:
     explicit InspectableNode(Node* node) : m_node(node) { }
-    virtual ScriptValue get(ScriptState* state) override
+    ScriptValue get(ScriptState* state) override
     {
         return InjectedScriptHost::nodeAsScriptValue(state, m_node);
     }
 private:
     Node* m_node;
 };
 
 void InspectorDOMAgent::setInspectedNode(ErrorString* errorString, int nodeId)
 {
     Node* node = assertNode(errorString, nodeId);
@@ skipping 67 matching lines @@
     visitor->trace(m_searchResults);
 #endif
     visitor->trace(m_hoveredNodeForInspectMode);
     visitor->trace(m_history);
     visitor->trace(m_domEditor);
     visitor->trace(m_listener);
     InspectorBaseAgent::trace(visitor);
 }
 
 } // namespace blink