[Mac] With the new avatar button, tabs do not expand to fill bar in fullscreen

[Mac] With the new avatar button, tabs do not expand to fill bar in fullscreen

When in fullscreen we should give back the fullscreen icon's width to the tabstrip.

Before: https://drive.google.com/open?id=0B1B1Up4p2NRMdXloQ3phSElBeEk&authuser=1
After: https://drive.google.com/open?id=0B1B1Up4p2NRMM2JNRE56aC1uRDA&authuser=1

BUG=403561
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=291162

[noms (inactive), 2014-08-20 18:47:16]

Hiya,
Fixed a small issue when rendering the new avatar button, where in fullscreen
mode we were still hogging the 32 pixels that used to belong the fullscreen
icon. Please take a look. Thanks!

[Robert Sesek, 2014-08-20 19:07:53]

lgtm

[noms (inactive), 2014-08-20 19:31:23]

The CQ bit was checked by noms@chromium.org

[commit-bot: I haz the power, 2014-08-20 19:31:55]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/noms@chromium.org/493803002/1

[commit-bot: I haz the power, 2014-08-20 20:49:49]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu/builds/...)
  android_clang_dbg on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_clang_d...)

[commit-bot: I haz the power, 2014-08-20 20:53:19]

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

[commit-bot: I haz the power, 2014-08-20 20:53:20]

Try jobs failed on following builders:
  linux_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu/builds/...)
  android_clang_dbg on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_clang_d...)

[noms (inactive), 2014-08-21 14:21:25]

The CQ bit was checked by noms@chromium.org

[commit-bot: I haz the power, 2014-08-21 14:23:41]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/noms@chromium.org/493803002/1

[commit-bot: I haz the power, 2014-08-21 20:24:31]

Committed patchset #1 (1) as 291162