Close the media controls overflow menu when an item is selected.

third_party/WebKit/Source/core/html/shadow/MediaControls.cpp

 /*
  * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011, 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 826 matching lines @@
     invalidate(m_overlayPlayButton);
     invalidate(m_muteButton);
     invalidate(m_fullscreenButton);
     invalidate(m_downloadButton);
     invalidate(m_timeline);
     invalidate(m_volumeSlider);
 }
 
 bool MediaControls::overflowMenuVisible()
 {
-    return m_overflowList->isWanted();
+    return m_overflowList ? m_overflowList->isWanted() : false;
 }
 
 void MediaControls::toggleOverflowMenu()
 {
+    DCHECK(m_overflowList);
     m_overflowList->setIsWanted(!m_overflowList->isWanted());
 }
 
 DEFINE_TRACE(MediaControls)
 {
     visitor->trace(m_mediaElement);
     visitor->trace(m_panel);
     visitor->trace(m_overlayPlayButton);
     visitor->trace(m_overlayEnclosure);
     visitor->trace(m_playButton);
     visitor->trace(m_currentTimeDisplay);
     visitor->trace(m_timeline);
     visitor->trace(m_muteButton);
     visitor->trace(m_volumeSlider);
     visitor->trace(m_toggleClosedCaptionsButton);
     visitor->trace(m_fullscreenButton);
     visitor->trace(m_downloadButton);
     visitor->trace(m_durationDisplay);
     visitor->trace(m_enclosure);
     visitor->trace(m_textTrackList);
     visitor->trace(m_overflowMenu);
     visitor->trace(m_overflowList);
     visitor->trace(m_castButton);
     visitor->trace(m_overlayCastButton);
     HTMLDivElement::trace(visitor);
 }
 
 } // namespace blink