The attached html file fires a DOMCharacterDataModified event. That should not be dispatched since we just load the HTML file. Note that the HTML does not contain new-line at the end of file. If we add a new-line at the end of file, event won't be dispatched.
Created attachment 143787 [details] DOMCharacterDataModified event is wrongly dispatched.
The related bug is here: https://bugs.webkit.org/show_bug.cgi?id=86953 (This might not be viewable due to the security-restriction).
We probably just need to change the parser to use an API that doesn't trigger this mutation event, like we do with parserAddChild.
This bug has been fixed in r125162.
Marking as fixed per Comment #4.
Mass move bugs into the DOM component.