chromeos: Replace user image notifications with observer

components/user_manager/user_manager.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_H_
 #define COMPONENTS_USER_MANAGER_USER_MANAGER_H_
 
 #include <string>
 
 #include "base/callback_forward.h"
@@ skipping 21 matching lines @@
 // * Find/modify users, store user meta-data such as display name/email.
 class USER_MANAGER_EXPORT UserManager {
  public:
   // Interface that observers of UserManager must implement in order
   // to receive notification when local state preferences is changed
   class Observer {
    public:
     // Called when the local state preferences is changed.
     virtual void LocalStateChanged(UserManager* user_manager);
 
+    // Called when the image of the given user is changed.
+    virtual void OnUserImageChanged(const User& user);
+
+    // Called when the profile image download for the given user fails or
+    // user has the default profile image or no porfile image at all.
+    virtual void OnUserProfileImageUpdateFailed(const User& user);
+
+    // Called when the profile image for the given user is downloaded.
+    // |profile_image| contains the downloaded profile image.
+    virtual void OnUserProfileImageUpdated(const User& user,
+                                           const gfx::ImageSkia& profile_image);
+
    protected:
     virtual ~Observer();
   };
 
   // TODO(nkostylev): Refactor and move this observer out of UserManager.
   // Observer interface that defines methods used to notify on user session /
   // active user state changes. Default implementation is empty.
   class UserSessionStateObserver {
    public:
     // Called when active user has changed.
@@ skipping 241 matching lines @@
   virtual bool IsUserCryptohomeDataEphemeral(
       const AccountId& account_id) const = 0;
 
   virtual void AddObserver(Observer* obs) = 0;
   virtual void RemoveObserver(Observer* obs) = 0;
 
   virtual void AddSessionStateObserver(UserSessionStateObserver* obs) = 0;
   virtual void RemoveSessionStateObserver(UserSessionStateObserver* obs) = 0;
 
   virtual void NotifyLocalStateChanged() = 0;
+  virtual void NotifyUserImageChanged(const User& user) = 0;
+  virtual void NotifyUserProfileImageUpdateFailed(const User& user) = 0;
+  virtual void NotifyUserProfileImageUpdated(
+      const User& user,
+      const gfx::ImageSkia& profile_image) = 0;
 
   // Changes the child status and notifies observers.
   virtual void ChangeUserChildStatus(User* user, bool is_child) = 0;
 
 
   // Returns true if supervised users allowed.
   virtual bool AreSupervisedUsersAllowed() const = 0;
 
   // Returns "Local State" PrefService instance.
   virtual PrefService* GetLocalState() const = 0;
@@ skipping 61 matching lines @@
   static UserManager* GetForTesting();
 
   // Sets UserManager instance to the given |user_manager|.
   // Returns the previous value of the instance.
   static UserManager* SetForTesting(UserManager* user_manager);
 };
 
 }  // namespace user_manager
 
 #endif  // COMPONENTS_USER_MANAGER_USER_MANAGER_H_