aquilescanta 97a23ce572 Fix main thread playlist refreshes in HlsPlaylistTracker
The refresh handler in HlsPlaylistTracker was being instantiated in the
same thread as the MediaSource (i.e. Main thread).

Issue:#2108

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=140197553
2016-11-25 20:18:32 +00:00
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2016-11-25 20:18:32 +00:00