[webkit-dev] Adding archive.org-based page loading time performance tests

[Tony Gentilcore]

> Does it matter if the page contents are bad/incomplete?

Good point. Seems fine for any given page to be incomplete is a
specific way. The only thing that would concern me is if we always
miss a certain class of resources. For instance, if we never recorded
resources fetched via XHR, it could lead us to miss a class of
optimizations or, worse yet, to make a bad tradeoff.

-Tony