Record whether and why the media default controls are being shown.

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 264 matching lines @@
 {
     makeOpaque();
     m_panel->setIsWanted(true);
     m_panel->setIsDisplayed(true);
     if (m_overlayPlayButton)
         m_overlayPlayButton->updateDisplayType();
 }
 
 void MediaControls::mediaElementFocused()
 {
+    mediaElement().recordShowControls();

[philipj_slow, 2016/02/16 06:20:27]

This case is akin to the mouse moving over the video, which isn't counted
separately. While it is possible for ensureMediaControls() to create the
controls and start playing while the video is hidden such that the user never
sees the controls until moving the mouse or tabbing it into focus, these are odd
cases I don't think ought to be mixed in with the question "which condition
causes the media controls to be potentially visible?"

[mlamouri (slow - plz ping), 2016/02/18 15:49:31]

Removed.

     if (mediaElement().shouldShowControls()) {
         show();
         resetHideMediaControlsTimer();
     }
 }
 
 void MediaControls::hide()
 {
     m_panel->setIsWanted(false);
     m_panel->setIsDisplayed(false);
@@ skipping 454 matching lines @@
     visitor->trace(m_toggleClosedCaptionsButton);
     visitor->trace(m_fullScreenButton);
     visitor->trace(m_durationDisplay);
     visitor->trace(m_enclosure);
     visitor->trace(m_castButton);
     visitor->trace(m_overlayCastButton);
     HTMLDivElement::trace(visitor);
 }
 
 } // namespace blink