Adds bluetooth connection type to NetworkChangeNotifier.

This is for compliance with NetInfov3 (http://w3c.github.io/netinfo/).

BUG=378785

Review URL: https://codereview.chromium.org/307943004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274817 0039d316-1c4b-4281-b951-d872f2087c98
8 files changed