support surrogate in text-align: jutify , selection and cusor movement r=shanjian/smontagu sr=kin a=asa git-svn-id: svn://10.0.0.236/trunk@117573 18797224-902f-48f8-a5cc-f745e15eee43
support surrogate in text-align: jutify , selection and cusor movement r=shanjian/smontagu sr=kin a=asa git-svn-id: svn://10.0.0.236/trunk@117573 18797224-902f-48f8-a5cc-f745e15eee43