Make CloudPolicyValidator memory management clearer

chrome/browser/chromeos/settings/session_manager_operation.cc

Index: chrome/browser/chromeos/settings/session_manager_operation.cc
diff --git a/chrome/browser/chromeos/settings/session_manager_operation.cc b/chrome/browser/chromeos/settings/session_manager_operation.cc
index ed847589209fa0736305c5404076c0db125bdf0a..bdd59b682604b57aaa68928efe06238c1b53b84c 100644
--- a/chrome/browser/chromeos/settings/session_manager_operation.cc
+++ b/chrome/browser/chromeos/settings/session_manager_operation.cc
@@ -165,9 +165,8 @@ void SessionManagerOperation::ValidateDeviceSettings(
           base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
 
   std::unique_ptr<policy::DeviceCloudPolicyValidator> validator =
-      base::WrapUnique<policy::DeviceCloudPolicyValidator>(
-          policy::DeviceCloudPolicyValidator::Create(std::move(policy),
-                                                     background_task_runner));
+      policy::DeviceCloudPolicyValidator::Create(std::move(policy),
+                                                 background_task_runner);
 
   if (cloud_validations_) {
     // Policy auto-generated by session manager doesn't include a timestamp, so
@@ -206,8 +205,8 @@ void SessionManagerOperation::ValidateDeviceSettings(
     validator->RunValidation();
     ReportValidatorStatus(validator.get());
   } else {
-    // The Validator will delete itself once validation is complete.
-    validator.release()->StartValidation(
+    policy::DeviceCloudPolicyValidator::StartValidation(
+        std::move(validator),
         base::Bind(&SessionManagerOperation::ReportValidatorStatus,
                    weak_factory_.GetWeakPtr()));
   }