Migrate Cryptauth*Managers RegisterPrefs to CryptAuthService::RegisterProfilePrefs.

components/cryptauth/cryptauth_service.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/cryptauth/cryptauth_service.h"
+
+namespace cryptauth {
+
+class CryptAuthGCMManager;
+
+// static
+void CryptAuthService::RegisterProfilePrefs(PrefRegistrySimple* registry) {
+  CryptAuthGCMManager::RegisterPrefs(registry);
+  CryptAuthDeviceManager::RegisterPrefs(registry);
+  CryptAuthEnrollmentManager::RegisterPrefs(registry);
+}
+
+}  // namespace cryptauth