Tests pause functionality in detached frame.
Set timer for test function.
Script execution paused.
Call stack:
    0) window.removeIframe (pause-in-removed-frame.js:16)
    1) onXhrLoad (:8000/devtools/sources/debugger/resources/child.html:12)
    2) sendRequest (:8000/devtools/sources/debugger/resources/child.html:16)
    3) testFunction (pause-in-removed-frame.js:22)
Script execution resumed.