[iOS] Add accessor for ProfileOAuth2TokenServiceIOS instance and factory

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

 // 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.
 
 #ifndef IOS_PUBLIC_PROVIDER_CHROME_BROWSER_KEYED_SERVICE_PROVIDER_H_
 #define IOS_PUBLIC_PROVIDER_CHROME_BROWSER_KEYED_SERVICE_PROVIDER_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 
 enum class ServiceAccessType;
 
 class KeyedServiceBaseFactory;
 class ProfileOAuth2TokenService;
+class ProfileOAuth2TokenServiceIOS;
 class SigninManager;
 
 namespace autofill {
 class AutofillWebDataService;
 class PersonalDataManager;
 }
 
 namespace enhanced_bookmarks {
 class EnhancedBookmarkModel;
 }
@@ skipping 14 matching lines @@
   virtual ~KeyedServiceProvider();
 
   // Returns the ProfileOAuth2TokenService factory for dependencies.
   virtual KeyedServiceBaseFactory* GetProfileOAuth2TokenServiceFactory();
 
   // Returns an instance of ProfileOAuth2TokenService tied to |browser_state|.
   virtual ProfileOAuth2TokenService*
   GetProfileOAuth2TokenServiceForBrowserState(
       ChromeBrowserState* browser_state);
 
+  // Returns the ProfileOAuth2TokenServiceIOS factory for dependencies.
+  virtual KeyedServiceBaseFactory* GetProfileOAuth2TokenServiceIOSFactory();
+
+  // Returns an instance of ProfileOAuth2TokenServiceIOS tied to
+  // |browser_state|.
+  virtual ProfileOAuth2TokenServiceIOS*
+  GetProfileOAuth2TokenServiceIOSForBrowserState(
+      ChromeBrowserState* browser_state);
+
   // Returns the SigninManager factory for dependencies.
   virtual KeyedServiceBaseFactory* GetSigninManagerFactory();
 
   // Returns an instance of SigninManager tied to |browser_state|.
   virtual SigninManager* GetSigninManagerForBrowserState(
       ChromeBrowserState* browser_state);
 
   // Returns the autofill::AutofillWebDataService factory for dependencies.
   virtual KeyedServiceBaseFactory* GetAutofillWebDataFactory();
 
@@ skipping 27 matching lines @@
   virtual sync_driver::SyncService* GetSyncServiceForBrowserState(
       ChromeBrowserState* browser_state);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(KeyedServiceProvider);
 };
 
 }  // namespace ios
 
 #endif  // IOS_PUBLIC_PROVIDER_CHROME_BROWSER_KEYED_SERVICE_PROVIDER_H_