Simplify MediaControls::show() and hide()

Source/core/html/shadow/MediaControlElements.h

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 23 matching lines @@
 
 namespace WebCore {
 
 // ----------------------------
 
 class MediaControlPanelElement FINAL : public MediaControlDivElement {
 public:
     static PassRefPtr<MediaControlPanelElement> create(MediaControls&);
 
     void setCanBeDragged(bool);
-    void setIsDisplayed(bool);
 
     void resetPosition();
     void makeOpaque();
     void makeTransparent();
 
     virtual bool willRespondToMouseMoveEvents() OVERRIDE { return true; }
     virtual bool willRespondToMouseClickEvents() OVERRIDE { return true; }
 
 private:
     explicit MediaControlPanelElement(MediaControls&);
 
     virtual const AtomicString& shadowPseudoId() const OVERRIDE;
     virtual void defaultEventHandler(Event*) OVERRIDE;
 
     void startDrag(const LayoutPoint& eventLocation);
     void continueDrag(const LayoutPoint& eventLocation);
     void endDrag();
 
     void startTimer();
     void stopTimer();
     void transitionTimerFired(Timer<MediaControlPanelElement>*);
 
     void setPosition(const LayoutPoint&);
 
     bool m_canBeDragged;
     bool m_isBeingDragged;
-    bool m_isDisplayed;
     bool m_opaque;
     LayoutPoint m_lastDragEventLocation;
     LayoutPoint m_cumulativeDragOffset;
 
     Timer<MediaControlPanelElement> m_transitionTimer;
 };
 
 // ----------------------------
 
 class MediaControlPanelEnclosureElement FINAL : public MediaControlDivElement {
@@ skipping 171 matching lines @@
     virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
 
     IntRect m_videoDisplaySize;
     float m_fontSize;
 };
 
 
 } // namespace WebCore
 
 #endif // MediaControlElements_h