Backed out changeset ca2c0a7b3b3b (bug 1189138) for causing timeouts in test_BufferingWait_mp4.html on a CLOSED TREE

dom/media/mediasource/TrackBuffersManager.cpp

@@ -1516,12 +1516,6 @@ TrackBuffersManager::InsertFrames(TrackBuffer& aSamples,
   CheckNextInsertionIndex(aTrackData,
                           TimeUnit::FromMicroseconds(aSamples[0]->mTime));
 
-  // Adjust our demuxing index if necessary.
-  if (trackBuffer.mNextGetSampleIndex.isSome() &&
-      trackBuffer.mNextInsertionIndex.ref() <= trackBuffer.mNextGetSampleIndex.ref()) {
-    trackBuffer.mNextGetSampleIndex.ref() += aSamples.Length();
-  }
-
   TrackBuffer& data = trackBuffer.mBuffers.LastElement();
   data.InsertElementsAt(trackBuffer.mNextInsertionIndex.ref(), aSamples);
   trackBuffer.mNextInsertionIndex.ref() += aSamples.Length();