We should allow some room for the minus button so that it doesn't overlap with the expression text/value. Chromium report: http://code.google.com/p/chromium/issues/detail?id=89112#c14
Created attachment 168854 [details] Patch
Comment on attachment 168854 [details] Patch Clearing flags on attachment: 168854 Committed r131419: <http://trac.webkit.org/changeset/131419>
All reviewed patches have been landed. Closing bug.