Whitelist the bundled Connectivity Diagnostics for feedback

BUG=318025

Review URL: https://codereview.chromium.org/140823017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246509 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246509