Media Controls: don't activate buttons when tapping on hidden controls.

third_party/WebKit/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 157 matching lines @@
     setIsWanted(false);
 
   stopTimer();
 }
 
 void MediaControlPanelElement::didBecomeVisible() {
   DCHECK(m_isDisplayed && m_opaque);
   mediaElement().mediaControlsDidBecomeVisible();
 }
 
+bool MediaControlPanelElement::isOpaque() const {
+  return m_opaque;
+}
+
 void MediaControlPanelElement::makeOpaque() {
   if (m_opaque)
     return;
 
   setInlineStyleProperty(CSSPropertyOpacity, 1.0,
                          CSSPrimitiveValue::UnitType::Number);
   m_opaque = true;
 
   if (m_isDisplayed) {
     setIsWanted(true);
@@ skipping 841 matching lines @@
 MediaControlCurrentTimeDisplayElement*
 MediaControlCurrentTimeDisplayElement::create(MediaControls& mediaControls) {
   MediaControlCurrentTimeDisplayElement* element =
       new MediaControlCurrentTimeDisplayElement(mediaControls);
   element->setShadowPseudoId(
       AtomicString("-webkit-media-controls-current-time-display"));
   return element;
 }
 
 }  // namespace blink