Revert of All DCP manager tests that enroll/register are tested with all auths.

components/policy/core/common/cloud/mock_signing_service.cc

 // Copyright (c) 2016 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/policy/core/common/cloud/mock_signing_service.h"
 
 #include <string>
 
 #include "components/policy/core/common/cloud/cloud_policy_client.h"
 
 namespace em = enterprise_management;
 
 namespace policy {
 
 const char kSignedDataNonce[] = "+nonce";
 const char kSignature[] = "fake-signature";
 
 FakeSigningService::FakeSigningService() {}
 
 FakeSigningService::~FakeSigningService() {}
 
+void FakeSigningService::SignRegistrationData(
+      const em::CertificateBasedDeviceRegistrationData* registration_data,
+      em::SignedData* signed_data) {
+    DoSignData(registration_data->SerializeAsString(), signed_data);
+  }
+
 void FakeSigningService::SignData(const std::string& data,
                                   const SigningCallback& callback) {
   em::SignedData signed_data;
-  if (success_) {
-    SignDataSynchronously(data, &signed_data);
-  }
+  if (success_)
+    DoSignData(data, &signed_data);
   callback.Run(success_, signed_data);
 }
 
-void FakeSigningService::SignDataSynchronously(const std::string& data,
-    em::SignedData* signed_data) {
+void FakeSigningService::DoSignData(const std::string& data,
+                                    em::SignedData* signed_data) {
   signed_data->set_data(data + kSignedDataNonce);
   signed_data->set_signature(kSignature);
   signed_data->set_extra_data_bytes(sizeof(kSignedDataNonce) - 1);
 }
 
 void FakeSigningService::set_success(bool success) {
   success_ = success;
 }
 
 MockSigningService::MockSigningService() {}
 
 MockSigningService::~MockSigningService() {}
 
 } // namespace policy
+