GitLab

  - Apps content now will display 2 rows of Apps when there's enough vertical space
  - App styling/spacing has been tweaked
  - Margin of some elements replaced with padding so we can use offsetHeight to dynamically calculate the fixed height of the Bottom Panel (header + footer)

This CL depends on https://codereview.chromium.org/11412214/


BUG=164023

Review URL: https://chromiumcodereview.appspot.com/11428075

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@171159 0039d316-1c4b-4281-b951-d872f2087c98