Keep the media controls panel visible if the overflow menu is visible.

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 373 matching lines @@
   const bool ignoreVideoHover = behaviorFlags & IgnoreVideoHover;
   if (!ignoreVideoHover && m_isMouseOverControls)
     return false;
   // Don't hide if focus is on the HTMLMediaElement or within the
   // controls/shadow tree. (Perform the checks separately to avoid going
   // through all the potential ancestor hosts for the focused element.)
   const bool ignoreFocus = behaviorFlags & IgnoreFocus;
   if (!ignoreFocus &&
       (mediaElement().focused() || contains(document().focusedElement())))
     return false;
-  // Don't hide the media controls when the text track list is showing.
-  if (m_textTrackList->isWanted())
+  // Don't hide the media controls when a panel is showing.
+  if (m_textTrackList->isWanted() || m_overflowList->isWanted())
     return false;
   return true;
 }
 
 void MediaControls::playbackStarted() {
   BatchedControlUpdate batch(this);
 
   if (!RuntimeEnabledFeatures::newMediaPlaybackUiEnabled()) {
     m_currentTimeDisplay->setIsWanted(true);
     m_durationDisplay->setIsWanted(false);
@@ skipping 464 matching lines @@
   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