[MSE] Replacing existing samples with overlapping new samples will cause playback to stutter.
<rdar://problem/17665229>
Created attachment 236548 [details] Patch
Comment on attachment 236548 [details] Patch Clearing flags on attachment: 236548 Committed r172538: <http://trac.webkit.org/changeset/172538>
All reviewed patches have been landed. Closing bug.
<rdar://problem/19269019>