Tests that unload deprecation issues are reported
Inspector issue: {
    issue : {
        code : DeprecationIssue
        details : {
            deprecationIssueDetails : {
                affectedFrame : {
                    frameId : <string>
                }
                sourceCodeLocation : {
                    columnNumber : 1
                    lineNumber : 0
                    scriptId : <string>
                    url : 
                }
                type : UnloadHandler
            }
        }
    }
}