[Mac] Adds grippys to the left side of the Browser Actions container to resize the container (they do not work yet), refactors a bunch of code out of toolbar_controller.mm and adds a slight gradient'ed divider between the container and the page/wrench menus buttons.

http://imgur.com/OqKGF.png

TEST=none
BUG=26990
Review URL: http://codereview.chromium.org/606079

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@39231 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed