Reset the device policy machinery upon retrying enrollment.

BUG=chromium-os:18208
TEST=See bug description


Review URL: http://codereview.chromium.org/7676005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@97615 0039d316-1c4b-4281-b951-d872f2087c98
DeviceTokenFetcher::DeviceTokenFetcher(
    DeviceManagementService* service,
    CloudPolicyCacheBase* cache,
    CloudPolicyDataStore* data_store,
    PolicyNotifier* notifier,
    DelayedWorkScheduler* scheduler) {
  Initialize(service, cache, data_store, notifier, scheduler);
}

DeviceTokenFetcher::DeviceTokenFetcher(
    DeviceManagementService* service,
    CloudPolicyCacheBase* cache,
    CloudPolicyDataStore* data_store,
    PolicyNotifier* notifier,
    DelayedWorkScheduler* scheduler) {
  Initialize(service, cache, data_store, notifier, scheduler);
}
