Bug 1064705 - Don't treat EOS as fatal when reading optional block subelements in nestegg_read_packet.  r=cajbir
silence UNIMP spam
crash on vpx_codec_decode
assert if sbr not ended
Bug 1065235 - Apply eviction to all decoders owned by TrackBuffer and make EvictData threshold apply per-TrackBuffer rather than per-decoder.
Bug 1065235 - Make the SourceBuffer eviction threshold a hidden pref.
Bug 1067414 - Convert CubebUtils from a class of statics to a namespace.
Bug 1067414 - Use atomic storage for sPreferredSampleRate.
Bug 1065250 - Factor part of SourceBuffer::AppendData into new PrepareAppend function.
Bug 1065250 - Remove MP4 MOOV workaround.
Bug 1065250 - Factor some of SourceBuffer::AppendData into TrackBuffer::Append.  Move ContainerParser to a new file.