[iOS] Add accessor for ProfileOAuth2TokenServiceIOS instance and factory

ios/public/provider/chrome/browser/keyed_service_provider.cc

 // Copyright 2015 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.
 
 #include "ios/public/provider/chrome/browser/keyed_service_provider.h"
 
 #include "components/autofill/core/browser/webdata/autofill_webdata_service.h"
 
 namespace ios {
 
 KeyedServiceProvider::KeyedServiceProvider() {
 }
 
 KeyedServiceProvider::~KeyedServiceProvider() {
 }
 
 KeyedServiceBaseFactory*
 KeyedServiceProvider::GetProfileOAuth2TokenServiceFactory() {
   return nullptr;
 }
 
 ProfileOAuth2TokenService*
 KeyedServiceProvider::GetProfileOAuth2TokenServiceForBrowserState(
     ChromeBrowserState* browser_state) {
   return nullptr;
 }
 
+KeyedServiceBaseFactory*
+KeyedServiceProvider::GetProfileOAuth2TokenServiceIOSFactory() {
+  return nullptr;
+}
+
+ProfileOAuth2TokenServiceIOS*
+KeyedServiceProvider::GetProfileOAuth2TokenServiceIOSForBrowserState(
+    ChromeBrowserState* browser_state) {
+  return nullptr;
+}
+
 KeyedServiceBaseFactory* KeyedServiceProvider::GetSigninManagerFactory() {
   return nullptr;
 }
 
 SigninManager* KeyedServiceProvider::GetSigninManagerForBrowserState(
     ChromeBrowserState* browser_state) {
   return nullptr;
 }
 
 KeyedServiceBaseFactory* KeyedServiceProvider::GetAutofillWebDataFactory() {
@@ skipping 31 matching lines @@
 KeyedServiceBaseFactory* KeyedServiceProvider::GetSyncServiceFactory() {
   return nullptr;
 }
 
 sync_driver::SyncService* KeyedServiceProvider::GetSyncServiceForBrowserState(
     ios::ChromeBrowserState* browser_state) {
   return nullptr;
 }
 
 }  // namespace ios