Drop verification_key_hash from CloudPolicyClient constructor

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

Index: components/policy/core/common/cloud/mock_cloud_policy_client.cc
diff --git a/components/policy/core/common/cloud/mock_cloud_policy_client.cc b/components/policy/core/common/cloud/mock_cloud_policy_client.cc
index c3bdef223724144e47cc069360b5a8f4fe29bf0b..e58c19157c6a23581675d31c891e0f68f865178b 100644
--- a/components/policy/core/common/cloud/mock_cloud_policy_client.cc
+++ b/components/policy/core/common/cloud/mock_cloud_policy_client.cc
@@ -14,12 +14,11 @@ namespace em = enterprise_management;
 namespace policy {
 
 MockCloudPolicyClient::MockCloudPolicyClient()
-    : CloudPolicyClient(std::string(),
-                        std::string(),
-                        std::string(),
-                        nullptr,
-                        nullptr,
-                        nullptr) {}
+    : CloudPolicyClient(std::string(), /* machine_id */
+                        std::string(), /* machine_model */
+                        nullptr,       /* service */
+                        nullptr,       /* request_context */
+                        nullptr /* signing_service */) {}
 
 MockCloudPolicyClient::~MockCloudPolicyClient() {}