[Mac] Set the avatar button auth error before initially drawing the button.

[Mac] Set the avatar button auth error before initially drawing the button.

Otherwise when opening a new window (and initially drawing it), the button
will not take the auth error icon's size in consideration.

BUG=411962
Committed: https://crrev.com/fab5d305c83aa6b7ad70800d450b46c54dd31ddf
Cr-Commit-Position: refs/heads/master@{#293969}

[noms (inactive), 2014-09-09 15:59:35]

noms@chromium.org changed reviewers:
+ asvitkine@chromium.org

[Alexei Svitkine (slow), 2014-09-09 17:08:00]

lgtm

[noms (inactive), 2014-09-09 17:08:24]

The CQ bit was checked by noms@chromium.org

[commit-bot: I haz the power, 2014-09-09 17:13:36]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/noms@chromium.org/555923002/1

[commit-bot: I haz the power, 2014-09-09 18:21:01]

Committed patchset #1 (id:1) as 5bf72a25a0fc938197960c5cbc55d39da77af58c

[commit-bot: I haz the power, 2014-09-10 03:54:20]

Patchset 1 (id:??) landed as
https://crrev.com/fab5d305c83aa6b7ad70800d450b46c54dd31ddf
Cr-Commit-Position: refs/heads/master@{#293969}