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

chrome/browser/chromeos/policy/device_cloud_policy_initializer.cc

 // Copyright 2014 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 "chrome/browser/chromeos/policy/device_cloud_policy_initializer.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 55 matching lines @@
     cryptohome::AsyncMethodCaller* async_method_caller,
     std::unique_ptr<chromeos::attestation::AttestationFlow> attestation_flow)
     : local_state_(local_state),
       enterprise_service_(enterprise_service),
       background_task_runner_(background_task_runner),
       install_attributes_(install_attributes),
       state_keys_broker_(state_keys_broker),
       device_store_(device_store),
       manager_(manager),
       attestation_flow_(std::move(attestation_flow)),
-      signing_service_(async_method_caller) {}
+      signing_service_(base::MakeUnique<TpmEnrollmentKeySigningService>(
+          async_method_caller)) {}
+
+void DeviceCloudPolicyInitializer::SetSigningServiceForTesting(
+    std::unique_ptr<policy::SigningService> signing_service) {
+  signing_service_ = std::move(signing_service);
+}
 
 DeviceCloudPolicyInitializer::~DeviceCloudPolicyInitializer() {
   DCHECK(!is_initialized_);
 }
 
 void DeviceCloudPolicyInitializer::Init() {
   DCHECK(!is_initialized_);
 
   is_initialized_ = true;
   device_store_->AddObserver(this);
@@ skipping 163 matching lines @@
   if (!enrollment_callback.is_null())
     enrollment_callback.Run(status);
 }
 
 std::unique_ptr<CloudPolicyClient> DeviceCloudPolicyInitializer::CreateClient(
     DeviceManagementService* device_management_service) {
   return base::MakeUnique<CloudPolicyClient>(
       DeviceCloudPolicyManagerChromeOS::GetMachineID(),
       DeviceCloudPolicyManagerChromeOS::GetMachineModel(),
       kPolicyVerificationKeyHash, device_management_service,
-      g_browser_process->system_request_context(), &signing_service_);
+      g_browser_process->system_request_context(), signing_service_.get());
 }
 
 void DeviceCloudPolicyInitializer::TryToCreateClient() {
   if (!device_store_->is_initialized() ||
       !device_store_->has_policy() ||
       state_keys_broker_->pending() ||
       enrollment_handler_) {
     return;
   }
   StartConnection(CreateClient(enterprise_service_));
@@ skipping 40 matching lines @@
   if (success && (success = att_signed_data.ParseFromString(signed_data))) {
     em_signed_data.set_data(att_signed_data.data());
     em_signed_data.set_signature(att_signed_data.signature());
     em_signed_data.set_extra_data_bytes(att_signed_data.data().size() -
                                         data.size());
   }
   callback.Run(success, em_signed_data);
 }
 
 }  // namespace policy