Bug 888083 (part 1) - Remove all but one of the cases where a vanilla .h file #includes an inline-header.  r=jandem.

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extra : rebase_source : db025d7525529f28dfa112f009597e9fe982cfef
Bug 888083 (part 2) - Remove the final case where a vanilla .h file #includes an inline-header.  r=jandem.

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extra : rebase_source : cd4497c7136e17ca25446644af25294c09108b89
Bug 890248. Avoid situations where adding a new input to an AudioNode can race with a message telling the AudioNode to release its mPlayingRef. r=ehsan

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extra : rebase_source : 913683cc16a717bf73f9976292af965aba6b7758