[Autofill] Add upstreaming UKM

components/autofill/core/browser/test_autofill_client.cc

Index: components/autofill/core/browser/test_autofill_client.cc
diff --git a/components/autofill/core/browser/test_autofill_client.cc b/components/autofill/core/browser/test_autofill_client.cc
index 7df6c300ce4745be653aef47fc8bbaa6ae0a70ec..72b2da47cc1179c3227bf265ba42deb234220119 100644
--- a/components/autofill/core/browser/test_autofill_client.cc
+++ b/components/autofill/core/browser/test_autofill_client.cc
@@ -41,6 +41,10 @@ rappor::RapporServiceImpl* TestAutofillClient::GetRapporServiceImpl() {
   return rappor_service_.get();
 }
 
+ukm::UkmService* TestAutofillClient::GetUkmService() {
+  return ukm_service_test_harness_.test_ukm_service();
+}
+
 void TestAutofillClient::ShowAutofillSettings() {
 }