Regression test for crbug.com/1195927

Running test: test
Debugger.setBreakpoint result:
{
    actualLocation : {
        columnNumber : 2
        lineNumber : 2
        scriptId : <scriptId>
    }
    breakpointId : <breakpointId>
}
Debugger.paused call frames:
foo (foo.js:2:2)
(anonymous) (:0:0)
Debugger.setScriptSource result:
{
    status : BlockedByActiveFunction
}
foo(42) result:
{
    result : {
        description : 43
        type : number
        value : 43
    }
}