main frame - didStartProvisionalLoadForFrame
main frame - didCommitLoadForFrame
frame "<!--frame1-->" - didStartProvisionalLoadForFrame
main frame - didFinishDocumentLoadForFrame
main frame - didHandleOnloadEventsForFrame
frame "<!--frame1-->" - didFailProvisionalLoadWithError
main frame - didFinishLoadForFrame
 This test assumes the webarchive is not loaded.