[M53 cherry-pick] Migrate ArcUserDataService into ArcAuthService.

components/arc/arc_service_manager.h

Index: components/arc/arc_service_manager.h
diff --git a/components/arc/arc_service_manager.h b/components/arc/arc_service_manager.h
index 0f2e4a95dbe163f69d205f7f988a87a0bc4cc291..ac2f4a552aa7b901fe54517868f44887a62bb1ef 100644
--- a/components/arc/arc_service_manager.h
+++ b/components/arc/arc_service_manager.h
@@ -21,7 +21,6 @@ namespace arc {
 
 class ArcBridgeService;
 class ArcService;
-class ArcUserDataService;
 
 // Manages creation and destruction of services that communicate with the ARC
 // instance via the ArcBridgeService.
@@ -70,10 +69,6 @@ class ArcServiceManager {
     return activity_resolver_;
   }
 
-  ArcUserDataService* arc_user_data_service() {
-    return arc_user_data_service_.get();
-  }
-
  private:
   base::ThreadChecker thread_checker_;
   scoped_refptr<base::TaskRunner> blocking_task_runner_;
@@ -82,7 +77,6 @@ class ArcServiceManager {
   std::vector<std::unique_ptr<ArcService>> services_;
   scoped_refptr<ActivityIconLoader> icon_loader_;
   scoped_refptr<LocalActivityResolver> activity_resolver_;
-  std::unique_ptr<ArcUserDataService> arc_user_data_service_;
 
   // True once the window manager service got added, barring adding any more
   // of those since OnAshStarted() might be called multiple times.