This adds support for auto-sizing tab controls, adjusts the options dialog to
use it and takes care of any fallout due to the new layout handling. Also fixes
a couple of small bugs in the views Layout() machinery  and sanitizes layouting
of options pages.

BUG=36497
TEST=unit tests in tabbed_pane_unittest.cc and grid_layout_unittest.cc, as well as checking the options dialog in any supported language.

Review URL: http://codereview.chromium.org/2812026

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@51526 0039d316-1c4b-4281-b951-d872f2087c98