Nukes the nano tab style on gtk and brings back the toolbar for apps

Nukes the nano tab style on gtk and brings back the toolbar for apps
on gtk. This is a revert of most of r52070and 51478. I've kept parts
of these changes we want in though: comments, nuking nano tab gap on
views, having app tabs use a bigger icon.

BUG=49013
TEST=none

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=52830

[sky, 2010-07-16 21:00:52]

Elliot could you review this? It's mostly a revert of code you reviewed from
Rafael. He is on vacation.

Thanks,

  -Scott

http://codereview.chromium.org/3011007/diff/1/8
File chrome/browser/gtk/tabs/tab_gtk.cc (left):

http://codereview.chromium.org/3011007/diff/1/8#oldcode43
chrome/browser/gtk/tabs/tab_gtk.cc:43: tab->delegate()->IsToolbarVisible(tab)) {
I'll clean up the tabmenumodel separately.

[Elliot Glaysher, 2010-07-16 21:09:04]

OK

[rafaelw, 2010-07-16 21:10:19]

lgtm