Eliminate TextTrackCue::updateDisplayTree()

Source/core/html/track/TextTrackCue.h

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2012, 2013 Apple 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 62 matching lines @@
     unsigned cueIndex();
     void updateCueIndex(unsigned cueIndex) { m_cueIndex = cueIndex; }
     void invalidateCueIndex();
 
     using EventTarget::dispatchEvent;
     virtual bool dispatchEvent(PassRefPtrWillBeRawPtr<Event>) override;
 
     bool isActive() const { return m_isActive; }
     void setIsActive(bool active) { m_isActive = active; }
 
+    // Updates the display tree and appends it to container if it has not
+    // already been added.
     virtual void updateDisplay(HTMLDivElement& container) = 0;
 
-    // FIXME: Consider refactoring to eliminate or merge the following three members.
-    // https://code.google.com/p/chromium/issues/detail?id=322434
-    virtual void updateDisplayTree(double movieTime) = 0;
+    // Marks the nodes of the display tree as past or future relative to
+    // movieTime. If updateDisplay() has not been called there is no display
+    // tree and nothing is done.
+    virtual void updatePastAndFutureNodes(double movieTime) = 0;
 
+    // FIXME: Refactor to eliminate removeDisplayTree(). https://crbug.com/322434
     enum RemovalNotification {
         DontNotifyRegion,
         NotifyRegion
     };
     virtual void removeDisplayTree(RemovalNotification = NotifyRegion) = 0;
 
     virtual const AtomicString& interfaceName() const override;
 
 #ifndef NDEBUG
     virtual String toString() const = 0;
@@ skipping 19 matching lines @@
 
     unsigned m_cueIndex;
 
     bool m_isActive : 1;
     bool m_pauseOnExit : 1;
 };
 
 } // namespace blink
 
 #endif // TextTrackCue_h