Bug 1022501 - Fix Windows falsely reporting support for MP3 in fragmented MP4. r=cpearce

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extra : rebase_source : 5cd91bb97d4e2e35b88407c0b3cecdae9bfbd793
Bug 1022501 - Add MP3 support to MP4 demuxer. r=edwin

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rename : content/media/fmp4/eme/EMEAACDecoder.cpp => content/media/fmp4/eme/EMEAudioDecoder.cpp
rename : content/media/fmp4/eme/EMEAACDecoder.h => content/media/fmp4/eme/EMEAudioDecoder.h
rename : content/media/fmp4/ffmpeg/FFmpegAACDecoder.cpp => content/media/fmp4/ffmpeg/FFmpegAudioDecoder.cpp
rename : content/media/fmp4/ffmpeg/FFmpegAACDecoder.h => content/media/fmp4/ffmpeg/FFmpegAudioDecoder.h
extra : rebase_source : 964077ffa7abd11a5da586bfcdee2ee98d4bc210
Bug 1043843 - Avoid accessing nsIDOMBlob from worker thread. r=dhylands

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extra : rebase_source : e5199d8023a59d19546c5d1739ac59cb78caf322
Bug 1045591 - Fix media element's autoplay for audio-only stream. r=cpearce

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extra : rebase_source : 6aa73fd12d362a5eabe6362f8b9c86b41f959f5d