Add Finch Checks to the State Machine

Google Now will check the Finch Experiment state for
'Enable*' or '' before running

Additionally, it will also request the background permission unless the Finch Experiment state is 'EnableWithoutBackground'

Added some more logging for the state machine as well.

BUG=164227

Review URL: https://chromiumcodereview.appspot.com/21985002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@217342 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed