[Autofill] Add upstreaming UKM

ios/chrome/browser/ui/autofill/autofill_client_ios.mm

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/ui/autofill/autofill_client_ios.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
@@ skipping 62 matching lines @@
 }
 
 IdentityProvider* AutofillClientIOS::GetIdentityProvider() {
   return identity_provider_.get();
 }
 
 rappor::RapporServiceImpl* AutofillClientIOS::GetRapporServiceImpl() {
   return GetApplicationContext()->GetRapporServiceImpl();
 }
 
+ukm::UkmService* AutofillClientIOS::GetUkmService() {
+  return GetApplicationContext()->GetUkmService();
+}
+
 void AutofillClientIOS::ShowAutofillSettings() {
   NOTREACHED();
 }
 
 void AutofillClientIOS::ShowUnmaskPrompt(
     const CreditCard& card,
     UnmaskCardReason reason,
     base::WeakPtr<CardUnmaskDelegate> delegate) {
   unmask_controller_.ShowPrompt(
       // autofill::CardUnmaskPromptViewBridge manages its own lifetime, so
@@ skipping 124 matching lines @@
 
 void AutofillClientIOS::StartSigninFlow() {
   NOTIMPLEMENTED();
 }
 
 void AutofillClientIOS::ShowHttpNotSecureExplanation() {
   NOTIMPLEMENTED();
 }
 
 }  // namespace autofill