Bug 894191 - Run ContentParent::ShutDownProcesss() after ContentParent::KillHard(). r=jlebar

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extra : rebase_source : 2cd9c02feab01b9506d74f721f24068fb653879d
Bug 894964 - Stop throwing on navigator.mozSettings access if the page does not have settings permission. r=gwagner

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extra : rebase_source : 1f6432f6ae1729d2f97cd833a3c5882ee8cc3a4e