bug 868215 - add optgroup test r=surkov
Bug 867203 - Part 1: Unregister AudioBufferSourceNodes from PannerNodes when they die; r=padenot

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extra : rebase_source : 3c580a0feba39d01779a91e6bd10a10d98cb7114
Bug 867203 - Part 2: Remove useless mPannerNode member in AudioBufferSourceNode. r=ehsan

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extra : rebase_source : dc94f66dbb4291226ab3f2c6c1ad8dc7aa4081e7
Bug 867160 - Allow baseline to bypass scriptAnalysis on most scripts. r=jandem