Tests that RemoteObjectId is unique across processes.
Navigating twice to ensure fresh process
Runtime.evaluate {
    id : <number>
    result : {
        result : {
            className : Object
            description : Object
            objectId : <string>
            type : object
        }
    }
    sessionId : <string>
}
Navigating cross-process
Runtime.evaluate {
    id : <number>
    result : {
        result : {
            className : Object
            description : Object
            objectId : <string>
            type : object
        }
    }
    sessionId : <string>
}
Runtime.callFunctionOn {
    error : {
        code : -32000
        message : Cannot find context with specified id
    }
    id : <number>
    sessionId : <string>
}