Drop verification_key_hash from CloudPolicyClient constructor

chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.cc

Index: chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.cc
diff --git a/chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.cc b/chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.cc
index df022e079ba55af148393bb888d37c1922c71e2e..48f769cce3e88241e35e6778a4ca303de09eedcf 100644
--- a/chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.cc
+++ b/chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.cc
@@ -11,6 +11,7 @@
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/sparse_histogram.h"
 #include "base/sequenced_task_runner.h"
@@ -131,10 +132,11 @@ void UserCloudPolicyManagerChromeOS::Connect(
   // Use the system request context here instead of a context derived
   // from the Profile because Connect() is called before the profile is
   // fully initialized (required so we can perform the initial policy load).
-  std::unique_ptr<CloudPolicyClient> cloud_policy_client(new CloudPolicyClient(
-      std::string(), std::string(), kPolicyVerificationKeyHash,
-      device_management_service, system_request_context,
-      nullptr /* signing_service */));
+  std::unique_ptr<CloudPolicyClient> cloud_policy_client =
+      base::MakeUnique<CloudPolicyClient>(
+          std::string() /* machine_id */, std::string() /* machine_model */,
+          device_management_service, system_request_context,
+          nullptr /* signing_service */);
   CreateComponentCloudPolicyService(
       dm_protocol::kChromeExtensionPolicyType, component_policy_cache_path_,
       system_request_context, cloud_policy_client.get(), schema_registry());