The color change to the breakpoint outline is hard to see. Xcode uses a filled style for the breakpoint button when enabled.
Created attachment 295623 [details] Patch
Created attachment 295624 [details] [Image] before/after
Comment on attachment 295623 [details] Patch r=me! Sweet!
Comment on attachment 295623 [details] Patch Clearing flags on attachment: 295623 Committed r209089: <http://trac.webkit.org/changeset/209089>
All reviewed patches have been landed. Closing bug.