Change userid from a uint32_t to a string guid

components/mus/ws/window_manager_factory_registry.h

 // Copyright 2016 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 COMPONENTS_MUS_WS_WINDOW_MANAGER_FACTORY_REGISTRY_H_
 #define COMPONENTS_MUS_WS_WINDOW_MANAGER_FACTORY_REGISTRY_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 18 matching lines @@
 
 // WindowManagerFactoryRegistry tracks the set of registered
 // WindowManagerFactoryServices.
 class WindowManagerFactoryRegistry : public UserIdTrackerObserver {
  public:
   explicit WindowManagerFactoryRegistry(ConnectionManager* connection_manager,
                                         UserIdTracker* tracker);
   ~WindowManagerFactoryRegistry() override;
 
   void Register(
-      UserId user_id,
+      const UserId& user_id,
       mojo::InterfaceRequest<mojom::WindowManagerFactoryService> request);
 
   std::vector<WindowManagerFactoryService*> GetServices();
 
   void AddObserver(WindowManagerFactoryRegistryObserver* observer);
   void RemoveObserver(WindowManagerFactoryRegistryObserver* observer);
 
  private:
   friend class WindowManagerFactoryService;
   friend class test::WindowManagerFactoryRegistryTestApi;
 
   void AddServiceImpl(scoped_ptr<WindowManagerFactoryService> service);
 
-  bool ContainsServiceForUser(UserId user_id) const;
+  bool ContainsServiceForUser(const UserId& user_id) const;
   void OnWindowManagerFactoryConnectionLost(
       WindowManagerFactoryService* service);
   void OnWindowManagerFactorySet(WindowManagerFactoryService* service);
 
   // UserIdTrackerObserver:
-  void OnActiveUserIdChanged(UserId id) override;
-  void OnUserIdAdded(UserId id) override;
-  void OnUserIdRemoved(UserId id) override;
+  void OnActiveUserIdChanged(const UserId& id) override;
+  void OnUserIdAdded(const UserId& id) override;
+  void OnUserIdRemoved(const UserId& id) override;
 
   // Set to true the first time a valid factory has been found.
   bool got_valid_factory_ = false;
   UserIdTracker* id_tracker_;
   ConnectionManager* connection_manager_;
 
   std::vector<scoped_ptr<WindowManagerFactoryService>> services_;
 
   base::ObserverList<WindowManagerFactoryRegistryObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowManagerFactoryRegistry);
 };
 
 }  // namespace ws
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_WS_WINDOW_MANAGER_FACTORY_REGISTRY_H_