Add "critical" parameter to DMServer requests.

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

Index: components/policy/core/common/cloud/cloud_policy_client.cc
diff --git a/components/policy/core/common/cloud/cloud_policy_client.cc b/components/policy/core/common/cloud/cloud_policy_client.cc
index 9e9de83ee6ec94fc2dc393d29ac05e15266c9e86..fb71179c6daf052e5bfdf23918c5eed031213a01 100644
--- a/components/policy/core/common/cloud/cloud_policy_client.cc
+++ b/components/policy/core/common/cloud/cloud_policy_client.cc
@@ -214,6 +214,8 @@ void CloudPolicyClient::FetchPolicy() {
                           GetRequestContext()));
   policy_fetch_request_job_->SetDMToken(dm_token_);
   policy_fetch_request_job_->SetClientID(client_id_);
+  if (!public_key_version_valid_)
+    policy_fetch_request_job_->SetCritical(true);
 
   em::DeviceManagementRequest* request =
       policy_fetch_request_job_->GetRequest();