Update inspector classes to use OVERRIDE / FINAL when needed

Source/core/inspector/PageConsoleAgent.cpp

Index: Source/core/inspector/PageConsoleAgent.cpp
diff --git a/Source/core/inspector/PageConsoleAgent.cpp b/Source/core/inspector/PageConsoleAgent.cpp
index 8418b37db3d8b195b2246be81c07c4d0cabf25e0..3ce55350a7d5959cd619bd7de4fce70a9af19e7a 100644
--- a/Source/core/inspector/PageConsoleAgent.cpp
+++ b/Source/core/inspector/PageConsoleAgent.cpp
@@ -56,10 +56,10 @@ void PageConsoleAgent::clearMessages(ErrorString* errorString)
     InspectorConsoleAgent::clearMessages(errorString);
 }
 
-class InspectableNode : public InjectedScriptHost::InspectableObject {
+class InspectableNode FINAL : public InjectedScriptHost::InspectableObject {
 public:
     explicit InspectableNode(Node* node) : m_node(node) { }
-    virtual ScriptValue get(ScriptState* state)
+    virtual ScriptValue get(ScriptState* state) OVERRIDE
     {
         return InjectedScriptHost::nodeAsScriptValue(state, m_node);
     }