Reduce virtual usage in MediaControlElementTypes

Source/core/html/shadow/MediaControlElementTypes.h

Index: Source/core/html/shadow/MediaControlElementTypes.h
diff --git a/Source/core/html/shadow/MediaControlElementTypes.h b/Source/core/html/shadow/MediaControlElementTypes.h
index 19c3ca569e8884f26b15698f6c712ddeb690bbf7..c497c042dd223c0544c9efcb7acb8bb2c20b0d9b 100644
--- a/Source/core/html/shadow/MediaControlElementTypes.h
+++ b/Source/core/html/shadow/MediaControlElementTypes.h
@@ -87,14 +87,13 @@ public:
     virtual const AtomicString& shadowPseudoId() const = 0;
 
     virtual void setMediaController(MediaControllerInterface* controller) { m_mediaController = controller; }
-    virtual MediaControllerInterface* mediaController() const { return m_mediaController; }
+    MediaControllerInterface* mediaController() const { return m_mediaController; }
 
 protected:
     explicit MediaControlElement(MediaControlElementType, HTMLElement*);
     ~MediaControlElement() { }
 
     virtual void setDisplayType(MediaControlElementType);
-    virtual bool isMediaControlElement() const { return true; }
 
 private:
     MediaControllerInterface* m_mediaController;
@@ -106,7 +105,7 @@ private:
 
 class MediaControlDivElement : public HTMLDivElement, public MediaControlElement {
 protected:
-    virtual bool isMediaControlElement() const OVERRIDE { return MediaControlElement::isMediaControlElement(); }
+    virtual bool isMediaControlElement() const OVERRIDE FINAL { return true; }
     explicit MediaControlDivElement(Document&, MediaControlElementType);
 };
 
@@ -114,7 +113,7 @@ protected:
 
 class MediaControlInputElement : public HTMLInputElement, public MediaControlElement {
 protected:
-    virtual bool isMediaControlElement() const OVERRIDE { return MediaControlElement::isMediaControlElement(); }
+    virtual bool isMediaControlElement() const OVERRIDE FINAL { return true; }
     explicit MediaControlInputElement(Document&, MediaControlElementType);
 
 private: