Ensure we don't mutate DOM or dispatch events during render tree updates.
Created attachment 275532 [details]
Comment on attachment 275532 [details]
View in context: https://bugs.webkit.org/attachment.cgi?id=275532&action=review
> + auto count = NoEventDispatchAssertion::dropTemporarily();
If we plan to do more of this, maybe a RAII helper would be in good taste.
Created attachment 275534 [details]
Created attachment 275537 [details]