Bug 1017419 - Handlify nsTArrayToJSArray, r=terrence

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extra : rebase_source : 802407d2c25fe060e16b546890859720664158ae
Bug 941796 - Enable exact rooting by default on b2g, r=nbp

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extra : rebase_source : cb434277679a505c6539fc03fcbd354233a8f01a