Just to make sure — now the idle tasks are running eventually, correct (I'm asking because we have a problem when they don't run at all in layout tests).

We have runIdleTasks in js bindings for layout tests. I wonder if it would help to support it in browser tests as well? 

> Just to make sure — now the idle tasks are running eventually, correct (I'm asking because we have a problem when they don't run at all in layout tests).

Do you mean when I'm not forcing the runs? No, I don't think they do (or at least, not fast enough because all the test for Find-in-page timed out both the ones on blink or browser)

> We have runIdleTasks in js bindings for layout tests. I wonder if it would help to support it in browser tests as well? 

Yeah, being able to force the running of idle tasks from browser side is ideal. From hajimehoshi@, I guess this is the first occurence of the use case, so I understand if it's not high priority.