Update remaining HTML classes to use OVERRIDE / FINAL when needed

Source/core/html/ime/InputMethodContext.h

Index: Source/core/html/ime/InputMethodContext.h
diff --git a/Source/core/html/ime/InputMethodContext.h b/Source/core/html/ime/InputMethodContext.h
index 237cedd5c0e55f3c8ea600f1d290806f0c7db6ca..2aeea390d384b6e5b73268c6b33d903fbe36aab4 100644
--- a/Source/core/html/ime/InputMethodContext.h
+++ b/Source/core/html/ime/InputMethodContext.h
@@ -46,10 +46,10 @@ class ExecutionContext;
 class InputMethodController;
 class Node;
 
-class InputMethodContext : public ScriptWrappable, public EventTargetWithInlineData {
+class InputMethodContext FINAL : public ScriptWrappable, public EventTargetWithInlineData {
 public:
     static PassOwnPtr<InputMethodContext> create(HTMLElement*);
-    ~InputMethodContext();
+    virtual ~InputMethodContext();
 
     void ref() { m_element->ref(); }
     void deref() { m_element->deref(); }