Bug 1061756 - Remove MozLoopService #ifdef DEBUG and fix tests. r=jaws

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extra : rebase_source : ffecebf4de59e85381e943e521b23d3da80a9a3d
Bug 979041 - Wrap an area (area_tabstrip) synchronously before the transition and use requestAnimationFrame. r=mconley

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extra : rebase_source : 37cd17566f7fc127481c63fd41ba0e55b7072472