change to no longer support single-':' pseudo-elements. Bug 211657, r+sr=dbaron git-svn-id: svn://10.0.0.236/trunk@145214 18797224-902f-48f8-a5cc-f745e15eee43
git-svn-id: svn://10.0.0.236/trunk@129536 18797224-902f-48f8-a5cc-f745e15eee43
git-svn-id: svn://10.0.0.236/trunk@126300 18797224-902f-48f8-a5cc-f745e15eee43