Ensure media control goes to transparent(hide) after seek by touch

Source/core/html/shadow/MediaControls.h

 /*
  * 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 67 matching lines @@
     explicit MediaControls(HTMLMediaElement&);
 
     void initializeControls();
 
     void makeOpaque();
     void makeTransparent();
 
     void updatePlayState();
 
     enum HideBehaviorFlags {
+        IgnoreNone = 0,
         IgnoreVideoHover = 1 << 0,
         IgnoreFocus = 1 << 1,
         IgnoreControlsHover = 1 << 2
     };
 
     bool shouldHideMediaControls(unsigned behaviorFlags = 0) const;
     void hideMediaControlsTimerFired(Timer<MediaControls>*);
-    void startHideMediaControlsTimer();
+    void startHideMediaControlsTimer(unsigned behaviorFlags = IgnoreNone);
     void stopHideMediaControlsTimer();
     void resetHideMediaControlsTimer();
 
     // Attempts to show the overlay cast button. If it is covered by another
     // element in the page, it will be hidden.
     void tryShowOverlayCastButton();
 
     void createTextTrackDisplay();
     void showTextTrackDisplay();
     void hideTextTrackDisplay();
@@ skipping 21 matching lines @@
     RawPtrWillBeMember<MediaControlMuteButtonElement> m_muteButton;
     RawPtrWillBeMember<MediaControlVolumeSliderElement> m_volumeSlider;
     RawPtrWillBeMember<MediaControlToggleClosedCaptionsButtonElement> m_toggleClosedCaptionsButton;
     RawPtrWillBeMember<MediaControlFullscreenButtonElement> m_fullScreenButton;
     RawPtrWillBeMember<MediaControlCastButtonElement> m_castButton;
     RawPtrWillBeMember<MediaControlCastButtonElement> m_overlayCastButton;
     RawPtrWillBeMember<MediaControlTimeRemainingDisplayElement> m_durationDisplay;
     RawPtrWillBeMember<MediaControlPanelEnclosureElement> m_enclosure;
 
     Timer<MediaControls> m_hideMediaControlsTimer;
+    unsigned m_hideTimerBehaviorFlags;
     bool m_isMouseOverControls : 1;
     bool m_isPausedForScrubbing : 1;
-    bool m_wasLastEventTouch : 1;
 };
 
 DEFINE_ELEMENT_TYPE_CASTS(MediaControls, isMediaControls());
 
 }
 
 #endif