Separate the text track container from the media controls

Source/core/layout/LayoutTextTrackContainer.cpp

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 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.
@@ skipping 29 matching lines @@
 }
 
 void LayoutTextTrackContainer::layout()
 {
     LayoutBlockFlow::layout();
     if (style()->display() == NONE)
         return;
 
     DeprecatedScheduleStyleRecalcDuringLayout marker(node()->document().lifecycle());
 
-    // Overlay enclosure -> Media controls -> Media element
-    LayoutObject* mediaElementLayoutObject = parent()->parent()->parent();
-    if (!mediaElementLayoutObject || !mediaElementLayoutObject->isVideo())
+    LayoutObject* mediaLayoutObject = parent();
+    if (!mediaLayoutObject || !mediaLayoutObject->isVideo())
         return;
-    if (updateSizes(toLayoutVideo(*mediaElementLayoutObject)))
+    if (updateSizes(toLayoutVideo(*mediaLayoutObject)))
         toElement(node())->setInlineStyleProperty(CSSPropertyFontSize, m_fontSize, CSSPrimitiveValue::CSS_PX);
 }
 
 bool LayoutTextTrackContainer::updateSizes(const LayoutVideo& videoLayoutObject)
 {
     // FIXME: The video size is used to calculate the font size (a workaround
     // for lack of per-spec vh/vw support) but the whole media element is used
     // for cue rendering. This is inconsistent. See also the somewhat related
     // spec bug: https://www.w3.org/Bugs/Public/show_bug.cgi?id=28105
     IntSize videoSize = videoLayoutObject.videoBox().size();
     if (m_videoSize == videoSize)
         return false;
     m_videoSize = videoSize;
 
     float smallestDimension = std::min(m_videoSize.height(), m_videoSize.width());
 
     float fontSize = smallestDimension * 0.05f;
     if (m_fontSize == fontSize)
         return false;
     m_fontSize = fontSize;
     return true;
 }
 
 } // namespace blink