Bug 960246 - Handle failures when executing frame scripts (r=smaug,bholley)
Bug 960246 - Rename JSContext |ctx| to |cx| (r=smaug)
Bug 960246 - Handle failures when running message manager message handlers (r=smaug)
Bug 942374 - Restore sessions by message passing (r=ttaubert)
Bug 942374 - Enable session restore for electrolysis (r=ttaubert)