Update remaining HTML classes to use OVERRIDE / FINAL when needed

Source/core/html/shadow/MediaControls.h

Index: Source/core/html/shadow/MediaControls.h
diff --git a/Source/core/html/shadow/MediaControls.h b/Source/core/html/shadow/MediaControls.h
index 0a267bf15b1ec05fc98e9529a7c8e2a9c1be803a..5ac95b93205fbf65bbab778ee4499b35a3506533 100644
--- a/Source/core/html/shadow/MediaControls.h
+++ b/Source/core/html/shadow/MediaControls.h
@@ -95,9 +95,9 @@ class MediaControls : public HTMLDivElement {
 protected:
     explicit MediaControls(Document&);
 
-    virtual void defaultEventHandler(Event*);
+    virtual void defaultEventHandler(Event*) OVERRIDE;
 
-    virtual bool containsRelatedTarget(Event*);
+    bool containsRelatedTarget(Event*);
 
     MediaControllerInterface* m_mediaController;
 
@@ -121,9 +121,9 @@ protected:
     bool m_isMouseOverControls;
 
 private:
-    virtual bool isMediaControls() const { return true; }
+    virtual bool isMediaControls() const OVERRIDE FINAL { return true; }
 
-    virtual const AtomicString& shadowPseudoId() const;
+    virtual const AtomicString& shadowPseudoId() const OVERRIDE;
 };
 
 DEFINE_NODE_TYPE_CASTS(MediaControls, isMediaControls());