Audit the last time the Geolocation and Notification content settings
have been used.
This will be used as part of a resource/permission manager which will allow users to more easily see and modify which permissions are being granted to which websites.
Design Doc: https://docs.google.com/document/d/1oQwmj3AU4QYhTyGrYEGr6zaZhHUfx-wqUgEcQGbUU-U/edit?usp=sharing
BUG=372607
Review URL: https://codereview.chromium.org/
356543003
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283909 0039d316-1c4b-4281-b951-d872f2087c98