GitLab

The grey bar is added to the primary display to denote the launcher.
This doesn't make sense because now we provide a launcher for each
display, and we decided to just remove the launcher rather than
keeping it to every displays.

BUG=175569


Review URL: https://chromiumcodereview.appspot.com/12208121

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@181982 0039d316-1c4b-4281-b951-d872f2087c98