in anticipation of nixing NS_COMFALSE in the near future.
r=scc (please contact him should there be any build issues)
git-svn-id: svn://10.0.0.236/trunk@51977 18797224-902f-48f8-a5cc-f745e15eee43
Added nsIMutableStyleContext interface.
Made style rules work against nsIMutableStyleContext
r=troy
git-svn-id: svn://10.0.0.236/trunk@50919 18797224-902f-48f8-a5cc-f745e15eee43