linux_aura: Fix all instances of LabelButton sizing.

linux_aura: Fix all instances of LabelButton sizing.

Previous attempts at fixing this involved tracking down each button
which was setting the minimum size to 0,0. Those attempts are reverted,
as I no longer think they're wrong. The actual fix is to pass through
the views inset size instead of using the GTK inset size.

BUG=349183, 344498, 339247
R=msw@chromium.org, sky@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=255091

[Elliot Glaysher, 2014-03-04 23:23:07]

msw: review the gtk2_border.cc change.
sky: owners stamp the rest which are reverts of my previous attempts to fix
this.

[sky, 2014-03-04 23:51:21]

LGTM

[msw, 2014-03-04 23:55:51]

lgtm

[Elliot Glaysher, 2014-03-04 23:56:23]

The CQ bit was checked by erg@chromium.org

[commit-bot: I haz the power, 2014-03-05 00:02:12]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/erg@chromium.org/187133003/20001

[commit-bot: I haz the power, 2014-03-05 01:20:44]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/erg@chromium.org/187133003/20001

[commit-bot: I haz the power, 2014-03-05 06:51:17]

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

[commit-bot: I haz the power, 2014-03-05 06:51:18]

Retried try job too often on win_rel for step(s) base_unittests, net_unittests,
unit_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[Elliot Glaysher, 2014-03-05 18:32:49]

Committed patchset #2 manually as r255091 (presubmit successful).