StyleResolver::addToMatchedPropertiesCache() keeps resetting the timer as more than matchedDeclarationCacheAdditionsBetweenSweeps entries are added. When armed, we should let the timer expire at its scheduled time - otherwise it may never get a chance to fire if entries keep getting added.
Created attachment 185504 [details]
Comment on attachment 185504 [details]
Clearing flags on attachment: 185504
Committed r141280: <http://trac.webkit.org/changeset/141280>
All reviewed patches have been landed. Closing bug.