Revert of [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 ac2f4a552aa7b901fe54517868f44887a62bb1ef..0f2e4a95dbe163f69d205f7f988a87a0bc4cc291 100644
--- a/components/arc/arc_service_manager.h
+++ b/components/arc/arc_service_manager.h
@@ -21,6 +21,7 @@
 
 class ArcBridgeService;
 class ArcService;
+class ArcUserDataService;
 
 // Manages creation and destruction of services that communicate with the ARC
 // instance via the ArcBridgeService.
@@ -69,6 +70,10 @@
     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_;
@@ -77,6 +82,7 @@
   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.