Remove the logic for de-duplicating in-band text track cues

Source/core/html/track/TextTrack.cpp

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2011, 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 399 matching lines @@
 int TextTrack::trackIndexRelativeToRenderedTracks()
 {
     ASSERT(m_mediaElement);
 
     if (m_renderedTrackIndex == invalidTrackIndex)
         m_renderedTrackIndex = m_mediaElement->textTracks()->getTrackIndexRelativeToRenderedTracks(this);
 
     return m_renderedTrackIndex;
 }
 
-bool TextTrack::hasCue(TextTrackCue* cue)
-{
-    if (cue->startTime() < 0 || cue->endTime() < 0)
-        return false;
-
-    if (!m_cues || !m_cues->length())
-        return false;
-
-    size_t searchStart = 0;
-    size_t searchEnd = m_cues->length();
-
-    while (1) {
-        ASSERT(searchStart <= m_cues->length());
-        ASSERT(searchEnd <= m_cues->length());
-
-        TextTrackCue* existingCue;
-
-        // Cues in the TextTrackCueList are maintained in start time order.
-        if (searchStart == searchEnd) {
-            if (!searchStart)
-                return false;
-
-            // If there is more than one cue with the same start time, back up to first one so we
-            // consider all of them.
-            while (searchStart >= 2 && cue->startTime() == m_cues->item(searchStart - 2)->startTime())
-                --searchStart;
-
-            bool firstCompare = true;
-            while (1) {
-                if (!firstCompare)
-                    ++searchStart;
-                firstCompare = false;
-                if (searchStart > m_cues->length())
-                    return false;
-
-                existingCue = m_cues->item(searchStart - 1);
-                if (!existingCue || cue->startTime() > existingCue->startTime())
-                    return false;
-
-                if (*existingCue != *cue)
-                    continue;
-
-                return true;
-            }
-        }
-
-        size_t index = (searchStart + searchEnd) / 2;
-        existingCue = m_cues->item(index);
-        if (cue->startTime() < existingCue->startTime() || (cue->startTime() == existingCue->startTime() && cue->endTime() > existingCue->endTime()))
-            searchEnd = index;
-        else
-            searchStart = index + 1;
-    }
-
-    ASSERT_NOT_REACHED();
-    return false;
-}
-
 const AtomicString& TextTrack::interfaceName() const
 {
     return EventTargetNames::TextTrack;
 }
 
 ExecutionContext* TextTrack::executionContext() const
 {
     return m_document;
 }
 
 } // namespace WebCore