Rename text track methods to make way for audio & video tracks.

Source/core/html/HTMLTrackElement.cpp

 /*
  * Copyright (C) 2011 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 61 matching lines @@
 Node::InsertionNotificationRequest HTMLTrackElement::insertedInto(ContainerNode* insertionPoint)
 {
     WTF_LOG(Media, "HTMLTrackElement::insertedInto");
 
     // Since we've moved to a new parent, we may now be able to load.
     scheduleLoad();
 
     HTMLElement::insertedInto(insertionPoint);
     HTMLMediaElement* parent = mediaElement();
     if (insertionPoint == parent)
-        parent->didAddTrack(this);
+        parent->didAddTrackElement(this);
     return InsertionDone;
 }
 
 void HTMLTrackElement::removedFrom(ContainerNode* insertionPoint)
 {
     if (!parentNode() && isHTMLMediaElement(*insertionPoint))
-        toHTMLMediaElement(insertionPoint)->didRemoveTrack(this);
+        toHTMLMediaElement(insertionPoint)->didRemoveTrackElement(this);
     HTMLElement::removedFrom(insertionPoint);
 }
 
 void HTMLTrackElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
 {
     if (name == srcAttr) {
         if (!value.isEmpty())
             scheduleLoad();
         else if (m_track)
             m_track->removeAllCues();
@@ skipping 206 matching lines @@
 
 HTMLMediaElement* HTMLTrackElement::mediaElement() const
 {
     Element* parent = parentElement();
     if (parent && parent->isMediaElement())
         return toHTMLMediaElement(parentNode());
     return 0;
 }
 
 }
-