To make testing bug 706193 easier, I want to convert the font inflation reftests to use the reftest harness rather than the mochitest harness. Bug 743105 allows doing this. This makes it easy to make the existing tests, written on the assumption of not having bug 706193, run with that fix disabled, but to make new tests that test that fix and run with it enabled. Note also that I ran into bug 743805 while doing this, and had to modify a few of the tests (for which we must have been cutting off the scrollbars when running in the mochitest harness, perhaps?).
Also noticed bug 706889 comment 24 while checking that I did this correctly.
Created attachment 613462 [details] [diff] [review] patch