GitLab

Added ability of providers to append arbitrary information to be presented in the omnibox metrics window.
Adjust formatting somewhat.

BUG=None
TEST=Observe
Review URL: https://chromiumcodereview.appspot.com/10692075

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148905 0039d316-1c4b-4281-b951-d872f2087c98