Bug 849068 - Fix some build warnings in the StoreBuffer; r=billm

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extra : rebase_source : 3907302df2bd102314c9112055b1c6ee8f63ffd1
Bug 849452 - Remove unused SetProxyPrivate; r=billm

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extra : rebase_source : 80ddeeeb3a39ae8815177e1998f2b39be356e97e