Minor fix on message center footer.

Minor fix on message center footer.

1. Add a border bar to the top of the footer button area.
2. Change the inset size of the footer and scroll_content. The existing
   code scrolls the contents right after the button content, but a
   buffer is necessary.


Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=182166

[dharcourt, 2013-02-12 02:31:47]

lgtm

[commit-bot: I haz the power, 2013-02-12 03:28:08]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a lowly provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[Jun Mukai, 2013-02-12 17:37:52]

miket, can you review this?
I'm asking some guys why CQ still thinks Charles isn't a committer...

[miket_OOO, 2013-02-13 00:20:25]

lgtm

[commit-bot: I haz the power, 2013-02-13 00:46:11]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/mukai@chromium.org/12221126/1

[commit-bot: I haz the power, 2013-02-13 08:32:02]

Change committed as 182166