r=sfraser
a=waterson
We now invalidate the line explicitly if text-align:right is set, because
our incremental painting is biased towards frames that grow to L2R. This
is a heavy-handed workaround, but it ends up doing very little extra invalidation,
and uses an already existing mechanism by just setting an existing flag.
git-svn-id: svn://10.0.0.236/trunk@79722 18797224-902f-48f8-a5cc-f745e15eee43