commit ee772c52525c0b5aa284d8aadb549db05b60ce41
author Shawn Pearce <sop@google.com> Sat Dec 07 13:58:17 2013 -0800
committer Shawn Pearce <sop@google.com> Sat Dec 07 14:05:19 2013 -0800
tree 4ff8da8451e7b8810605854c042da8d1ca8592a8
parent d7f80ca6215ec1879837f927cace8bc1314adbff

ChangeScreen2: Display a welcome bar to new users

If the user's preferences are for the site default screen, display a
welcome bar in the header with a link to the new screen documentation.
Immediately update the user's preference to be either the old screen,
or the new screen to prevent the bar from displaying again.

For anonymous users save a "gerrit_cs2" cookie for 7 days with the
value of "0" (old screen) or "1" (new screen) when the user clicks
a link to dismiss the welcome bar.

Change-Id: Idc371732bbfa160e47075b8d01bc877a46d1b723