Rearrange MediaControls members to match DOM structure

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 32 matching lines @@
 static const double timeWithoutMouseMovementBeforeHidingMediaControls = 3;
 
 static bool fullscreenIsSupported(const Document& document)
 {
     return !document.settings() || document.settings()->fullscreenSupported();
 }
 
 MediaControls::MediaControls(HTMLMediaElement& mediaElement)
     : HTMLDivElement(mediaElement.document())
     , m_mediaElement(&mediaElement)
+    , m_overlayEnclosure(nullptr)
+    , m_overlayPlayButton(nullptr)
+    , m_overlayCastButton(nullptr)
+    , m_enclosure(nullptr)
     , m_panel(nullptr)
-    , m_overlayPlayButton(nullptr)
-    , m_overlayEnclosure(nullptr)
     , m_playButton(nullptr)
+    , m_timeline(nullptr)
     , m_currentTimeDisplay(nullptr)
-    , m_timeline(nullptr)
+    , m_durationDisplay(nullptr)
     , m_muteButton(nullptr)
     , m_volumeSlider(nullptr)
     , m_toggleClosedCaptionsButton(nullptr)
+    , m_castButton(nullptr)
     , m_fullScreenButton(nullptr)
-    , m_castButton(nullptr)
-    , m_overlayCastButton(nullptr)
-    , m_durationDisplay(nullptr)
-    , m_enclosure(nullptr)
     , m_hideMediaControlsTimer(this, &MediaControls::hideMediaControlsTimerFired)
     , m_hideTimerBehaviorFlags(IgnoreNone)
     , m_isMouseOverControls(false)
     , m_isPausedForScrubbing(false)
 {
 }
 
 PassRefPtrWillBeRawPtr<MediaControls> MediaControls::create(HTMLMediaElement& mediaElement)
 {
     RefPtrWillBeRawPtr<MediaControls> controls = adoptRefWillBeNoop(new MediaControls(mediaElement));
@@ skipping 456 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);
 }
 
 }