frame "<!--frame1-->" - didStartProvisionalLoadForFrame
main frame - didFinishDocumentLoadForFrame
frame "<!--frame1-->" - didCommitLoadForFrame
frame "<!--frame1-->" - didFinishDocumentLoadForFrame
frame "<!--frame1-->" - didFailLoadWithError
main frame - didFinishLoadForFrame
This tests a subframe that removes itself to make sure a delegate message to indicate the interrupted load fires.