Remove media controls when not in use.

Source/core/html/shadow/MediaControlElements.cpp

 /*
  * 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 339 matching lines @@
 const AtomicString& MediaControlPlayButtonElement::shadowPseudoId() const
 {
     DEFINE_STATIC_LOCAL(AtomicString, id, ("-webkit-media-controls-play-button", AtomicString::ConstructFromLiteral));
     return id;
 }
 
 // ----------------------------
 
 MediaControlOverlayPlayButtonElement::MediaControlOverlayPlayButtonElement(Document& document)
     : MediaControlInputElement(document, MediaOverlayPlayButton)
+    , m_visible(false)
 {
 }
 
 PassRefPtr<MediaControlOverlayPlayButtonElement> MediaControlOverlayPlayButtonElement::create(Document& document)
 {
     RefPtr<MediaControlOverlayPlayButtonElement> button = adoptRef(new MediaControlOverlayPlayButtonElement(document));
     button->ensureUserAgentShadowRoot();
     button->setType("button");
     return button.release();
 }
 
 void MediaControlOverlayPlayButtonElement::defaultEventHandler(Event* event)
 {
     if (event->type() == EventTypeNames::click && mediaController()->canPlay()) {
         mediaController()->play();
         updateDisplayType();
         event->setDefaultHandled();
     }
     HTMLInputElement::defaultEventHandler(event);
 }
 
 void MediaControlOverlayPlayButtonElement::updateDisplayType()
 {
-    if (mediaController()->canPlay()) {
+    if (m_visible && mediaController()->canPlay()) {
         show();
     } else
         hide();
 }
 
+void MediaControlOverlayPlayButtonElement::setVisible(bool visible)
+{
+    m_visible = visible;
+}
+
 const AtomicString& MediaControlOverlayPlayButtonElement::shadowPseudoId() const
 {
     DEFINE_STATIC_LOCAL(AtomicString, id, ("-webkit-media-controls-overlay-play-button", AtomicString::ConstructFromLiteral));
     return id;
 }
 
 
 // ----------------------------
 
 MediaControlToggleClosedCaptionsButtonElement::MediaControlToggleClosedCaptionsButtonElement(Document& document, MediaControls*)
@@ skipping 347 matching lines @@
     float fontSize = smallestDimension * 0.05f;
     if (fontSize != m_fontSize) {
         m_fontSize = fontSize;
         setInlineStyleProperty(CSSPropertyFontSize, fontSize, CSSPrimitiveValue::CSS_PX);
     }
 }
 
 // ----------------------------
 
 } // namespace WebCore