chromeos: Replace user image notifications with observer

components/user_manager/user_manager_base.h

 // Copyright 2014 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_USER_MANAGER_USER_MANAGER_BASE_H_
 #define COMPONENTS_USER_MANAGER_USER_MANAGER_BASE_H_
 
 #include <map>
 #include <memory>
 #include <set>
@@ skipping 86 matching lines @@
       const AccountId& account_id) const override;
   bool IsUserCryptohomeDataEphemeral(
       const AccountId& account_id) const override;
   void AddObserver(UserManager::Observer* obs) override;
   void RemoveObserver(UserManager::Observer* obs) override;
   void AddSessionStateObserver(
       UserManager::UserSessionStateObserver* obs) override;
   void RemoveSessionStateObserver(
       UserManager::UserSessionStateObserver* obs) override;
   void NotifyLocalStateChanged() override;
+  void NotifyUserImageChanged(const User& user) override;
+  void NotifyUserProfileImageUpdateFailed(const User& user) override;
+  void NotifyUserProfileImageUpdated(
+      const User& user,
+      const gfx::ImageSkia& profile_image) override;
   void ChangeUserChildStatus(User* user, bool is_child) override;
   void Initialize() override;
 
   // This method updates "User was added to the device in this session nad is
   // not full initialized yet" flag.
   virtual void SetIsCurrentUserNew(bool is_new);
 
   // TODO(xiyuan): Figure out a better way to expose this info.
   virtual bool HasPendingBootstrap(const AccountId& account_id) const;
 
@@ skipping 266 matching lines @@
   scoped_refptr<base::TaskRunner> task_runner_;
 
   base::WeakPtrFactory<UserManagerBase> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UserManagerBase);
 };
 
 }  // namespace user_manager
 
 #endif  // COMPONENTS_USER_MANAGER_USER_MANAGER_BASE_H_