Revert cross-origin auth prompt blocking.
BUG=174129

Review URL: https://chromiumcodereview.appspot.com/12183030

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@181113 0039d316-1c4b-4281-b951-d872f2087c98
    AuthInfo(const std::string username,
             const std::string password)
        : username_(username), password_(password) {}

    AuthInfo(const std::string username,
             const std::string password)
        : username_(username), password_(password) {}
