Refactor: Inject StatisticsProvider as a dependency of DeviceCloudPolicyInitializer.

chrome/browser/chromeos/policy/device_cloud_policy_initializer_unittest.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 "base/command_line.h"
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/policy/enrollment_config.h"
@@ skipping 29 matching lines @@
   DeviceCloudPolicyInitializerTest()
       : device_cloud_policy_initializer_(
             &local_state_,
             nullptr,
             nullptr,
             &install_attributes_,
             nullptr,
             nullptr,
             nullptr,
             nullptr,
-            base::MakeUnique<chromeos::attestation::MockAttestationFlow>()) {
+            base::MakeUnique<chromeos::attestation::MockAttestationFlow>(),
+            &statistics_provider_) {
     chrome::RegisterLocalState(local_state_.registry());
-    statistics_provider_.SetMachineStatistic("serial_number", "fake-serial");
+    statistics_provider_.SetMachineStatistic(
+        chromeos::system::kSerialNumberKey, "fake-serial");
+    statistics_provider_.SetMachineStatistic(
+        chromeos::system::kHardwareClassKey, "fake-hardware");
   }
 
   void SetupZeroTouchFlag();
 
   chromeos::system::ScopedFakeStatisticsProvider statistics_provider_;
   TestingPrefServiceSimple local_state_;
   chromeos::StubInstallAttributes install_attributes_;
   DeviceCloudPolicyInitializer device_cloud_policy_initializer_;
 };
 
@@ skipping 127 matching lines @@
                        EnrollmentConfig::AUTH_MECHANISM_INTERACTIVE,
                        EnrollmentConfig::AUTH_MECHANISM_INTERACTIVE),
         ZeroTouchParam("",  // Flag set without a set value.
                        EnrollmentConfig::AUTH_MECHANISM_BEST_AVAILABLE,
                        EnrollmentConfig::AUTH_MECHANISM_INTERACTIVE),
         ZeroTouchParam("forced",
                        EnrollmentConfig::AUTH_MECHANISM_ATTESTATION,
                        EnrollmentConfig::AUTH_MECHANISM_ATTESTATION)));
 
 }  // namespace policy