Bug 734691 - Add multi-thread support to profiler r=benwa

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extra : rebase_source : 71db00ee222713fd60ba42be14226b52535a4f1e
Bug 734691 - Port multi-thread support to win/mac. r=snorp,smaug

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extra : rebase_source : 41af95bcc4b6044b7394538e2524528f67cbd1d5