[Mac] Fix the alignment of the new avatar button and the bubble.

[Mac] Fix the alignment of the new avatar button and the bubble.

Before: https://drive.google.com/file/d/0B1B1Up4p2NRMLTQ1ZFc0blIwbzA/edit?usp=sharing
After: https://drive.google.com/file/d/0B1B1Up4p2NRMVUloNWhYY1luQjg/edit?usp=sharing

BUG=NONE
TEST=Start Chrome with --new-profile-management. Click on the avatar button.
The bubble's right edge should be perfectly aligned to the button's edge.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=284603

[Alexei Svitkine (slow), 2014-07-21 19:43:18]

lgtm

[noms (inactive), 2014-07-21 19:47:27]

The CQ bit was checked by noms@chromium.org

[commit-bot: I haz the power, 2014-07-21 19:48:35]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/noms@chromium.org/404443008/1

[commit-bot: I haz the power, 2014-07-21 21:50:10]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)
  ios_rel_device on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/ios_rel_device/builds...)
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)
  win_chromium_x64_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_x64_rel/...)

[commit-bot: I haz the power, 2014-07-21 22:01:07]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-07-21 22:01:08]

Try jobs failed on following builders:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)

[noms (inactive), 2014-07-22 00:35:45]

The CQ bit was checked by noms@chromium.org

[commit-bot: I haz the power, 2014-07-22 00:40:03]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/noms@chromium.org/404443008/1

[commit-bot: I haz the power, 2014-07-22 01:22:23]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)

[commit-bot: I haz the power, 2014-07-22 02:43:14]

Change committed as 284603