[EWS] find-modified-layout-tests step should include .svg tests
I think the right logic is to re-run any tests whose:
1. test changed
2. expectation changed
3. change in TestExpectations (removed/added/changed lines)
It would also be relevant to run tests whose subresources changed, but that's hard.
But let's just track .svg in this bug.
(In reply to Alexey Proskuryakov from comment #2)
> It would also be relevant to run tests whose subresources changed, but
> that's hard.
Would this include script? (I imagine that stress-testing all layout tests that import "resources/js-test.js" when adjusting that script could be a bit excessive, for instance).