HTMLMarqueeElement.trueSpeed is a boolean property, so setting it it to true sets an empty value. void Element::setBooleanAttribute(const QualifiedName& name, bool value) { if (value) setAttribute(name, emptyAtom); else removeAttribute(name); } But then HTMLMarqueeElement::minimumDelay() treats an empty value as false.
Created attachment 245308 [details] proposed fix
Comment on attachment 245308 [details] proposed fix Clearing flags on attachment: 245308 Committed r179102: <http://trac.webkit.org/changeset/179102>
All reviewed patches have been landed. Closing bug.