chromeos: Replace user image notifications with observer

chrome/browser/ui/webui/settings/profile_info_handler.cc

 // 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.
 
 #include "chrome/browser/ui/webui/settings/profile_info_handler.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 45 matching lines @@
       &g_browser_process->profile_manager()->GetProfileAttributesStorage());
 
   PrefService* prefs = profile_->GetPrefs();
   profile_pref_registrar_.Init(prefs);
   profile_pref_registrar_.Add(
       prefs::kSupervisedUsers,
       base::Bind(&ProfileInfoHandler::PushProfileManagesSupervisedUsersStatus,
                  base::Unretained(this)));
 
 #if defined(OS_CHROMEOS)
-  registrar_.Add(this, chrome::NOTIFICATION_LOGIN_USER_IMAGE_CHANGED,
-                 content::NotificationService::AllSources());
+  user_manager::UserManager::Get()->AddObserver(this);
 #endif
 }
 
 void ProfileInfoHandler::OnJavascriptDisallowed() {
   profile_observer_.Remove(
       &g_browser_process->profile_manager()->GetProfileAttributesStorage());
 
   profile_pref_registrar_.RemoveAll();
 
 #if defined(OS_CHROMEOS)
-  registrar_.RemoveAll();
+  user_manager::UserManager::Get()->RemoveObserver(this);
 #endif
 }
 
 #if defined(OS_CHROMEOS)
-void ProfileInfoHandler::Observe(int type,
-                                 const content::NotificationSource& source,
-                                 const content::NotificationDetails& details) {
-  DCHECK_EQ(chrome::NOTIFICATION_LOGIN_USER_IMAGE_CHANGED, type);
+void ProfileInfoHandler::OnUserImageChanged(const user_manager::User& user) {
   PushProfileInfo();
 }
 #endif
 
 void ProfileInfoHandler::OnProfileNameChanged(
     const base::FilePath& /* profile_path */,
     const base::string16& /* old_profile_name */) {
   PushProfileInfo();
 }
 
@@ skipping 80 matching lines @@
   response->SetString("name", name);
   response->SetString("iconUrl", icon_url);
   return base::WrapUnique(response);
 }
 
 bool ProfileInfoHandler::IsProfileManagingSupervisedUsers() const {
   return !profile_->GetPrefs()->GetDictionary(prefs::kSupervisedUsers)->empty();
 }
 
 }  // namespace settings