Make content::ResourceContext be a real interface like the rest of the Content API (i.e. don't have setters/getters on it, and make all the functions pure virtual).

BUG=98716
Review URL: https://chromiumcodereview.appspot.com/9369009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@121287 0039d316-1c4b-4281-b951-d872f2087c98
109 files changed