1 files changed, 19 insertions, 16 deletions

diff --git a/Source/WebCore/html/track/AudioTrackList.cpp b/Source/WebCore/html/track/AudioTrackList.cpp
index eb8c9a73f..71155690a 100644
--- a/Source/WebCore/html/track/AudioTrackList.cpp
+++ b/Source/WebCore/html/track/AudioTrackList.cpp
@@ -10,10 +10,10 @@
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
@@ -30,7 +30,6 @@
 #include "AudioTrackList.h"
 
 #include "AudioTrack.h"
-#include "EventNames.h"
 
 using namespace WebCore;
 
@@ -43,36 +42,40 @@ AudioTrackList::~AudioTrackList()
 {
 }
 
-void AudioTrackList::append(PassRefPtr<AudioTrack> prpTrack)
+void AudioTrackList::append(Ref<AudioTrack>&& track)
 {
-    RefPtr<AudioTrack> track = prpTrack;
-
     // Insert tracks in the media file order.
     size_t index = track->inbandTrackIndex();
-    m_inbandTracks.insert(index, track);
+    size_t insertionIndex;
+    for (insertionIndex = 0; insertionIndex < m_inbandTracks.size(); ++insertionIndex) {
+        auto& otherTrack = downcast<AudioTrack>(*m_inbandTracks[insertionIndex]);
+        if (otherTrack.inbandTrackIndex() > index)
+            break;
+    }
+    m_inbandTracks.insert(insertionIndex, track.ptr());
+
 
     ASSERT(!track->mediaElement() || track->mediaElement() == mediaElement());
     track->setMediaElement(mediaElement());
 
-    scheduleAddTrackEvent(track.release());
+    scheduleAddTrackEvent(WTFMove(track));
 }
 
 AudioTrack* AudioTrackList::item(unsigned index) const
 {
     if (index < m_inbandTracks.size())
-        return toAudioTrack(m_inbandTracks[index].get());
-
-    return 0;
+        return downcast<AudioTrack>(m_inbandTracks[index].get());
+    return nullptr;
 }
 
 AudioTrack* AudioTrackList::getTrackById(const AtomicString& id) const
 {
-    for (size_t i = 0; i < m_inbandTracks.size(); ++i) {
-        AudioTrack* track = toAudioTrack(m_inbandTracks[i].get());
-        if (track->id() == id)
-            return track;
+    for (auto& inbandTrack : m_inbandTracks) {
+        auto& track = downcast<AudioTrack>(*inbandTrack);
+        if (track.id() == id)
+            return &track;
     }
-    return 0;
+    return nullptr;
 }
 
 EventTargetInterface AudioTrackList::eventTargetInterface() const