ContentChanged was dispatched both when working copy was committed and UISourceCode was formatted before. WorkingCopyChanged event was dispatched when working copy was set. Now there are three explicit events: WorkingCopyChanged, WorkingCopyCommitted, FormattedChanged. No events are dispatched now during revisions restoring. Reverting to revisions is now implemented based on the working copy editing.
Created attachment 168003 [details] Patch
Committed r131169: <http://trac.webkit.org/changeset/131169>