Update inspector classes to use OVERRIDE / FINAL when needed

Source/core/inspector/InspectorConsoleAgent.cpp

Index: Source/core/inspector/InspectorConsoleAgent.cpp
diff --git a/Source/core/inspector/InspectorConsoleAgent.cpp b/Source/core/inspector/InspectorConsoleAgent.cpp
index 06f9e6a05c92ae835ae8c5f6a42650759f7bc120..354bfcadd5e5ea5e388900499cf72d1ad249bf09 100644
--- a/Source/core/inspector/InspectorConsoleAgent.cpp
+++ b/Source/core/inspector/InspectorConsoleAgent.cpp
@@ -326,10 +326,10 @@ void InspectorConsoleAgent::addConsoleMessage(PassOwnPtr<ConsoleMessage> console
     }
 }
 
-class InspectableHeapObject : public InjectedScriptHost::InspectableObject {
+class InspectableHeapObject FINAL : public InjectedScriptHost::InspectableObject {
 public:
     explicit InspectableHeapObject(int heapObjectId) : m_heapObjectId(heapObjectId) { }
-    virtual ScriptValue get(ScriptState*)
+    virtual ScriptValue get(ScriptState*) OVERRIDE
     {
         return ScriptProfiler::objectByHeapObjectId(m_heapObjectId);
     }