ash: Refresh the tray items, instead of recreating them, when login status changes.

ash/system/user/tray_user.cc

 // Copyright (c) 2012 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 "ash/system/user/tray_user.h"
 
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/system/tray/tray_item_view.h"
@@ skipping 244 matching lines @@
 }  // namespace tray
 
 TrayUser::TrayUser() {
 }
 
 TrayUser::~TrayUser() {
 }
 
 views::View* TrayUser::CreateTrayView(user::LoginStatus status) {
   avatar_.reset(new tray::RoundedImageView(kTrayRoundedBorderRadius));
-  if (status != user::LOGGED_IN_NONE && status != user::LOGGED_IN_KIOSK &&
-      status != user::LOGGED_IN_GUEST) {
-    avatar_->SetImage(
-        ash::Shell::GetInstance()->tray_delegate()->GetUserImage(),
-        gfx::Size(kUserIconSize, kUserIconSize));
-  } else {
-    avatar_->SetVisible(false);
-  }
   avatar_->set_border(views::Border::CreateEmptyBorder(0, 6, 0, 0));
+  UpdateAfterLoginStatusChange(status);
   return avatar_.get();
 }
 
 views::View* TrayUser::CreateDefaultView(user::LoginStatus status) {
   if (status == user::LOGGED_IN_NONE)
     return NULL;
 
   user_.reset(new tray::UserView(status));
   return user_.get();
 }
 
 views::View* TrayUser::CreateDetailedView(user::LoginStatus status) {
   return NULL;
 }
 
 void TrayUser::DestroyTrayView() {
   avatar_.reset();
 }
 
 void TrayUser::DestroyDefaultView() {
   user_.reset();
 }
 
 void TrayUser::DestroyDetailedView() {
 }
 
+void TrayUser::UpdateAfterLoginStatusChange(user::LoginStatus status) {
+  if (status != user::LOGGED_IN_NONE && status != user::LOGGED_IN_KIOSK &&
+      status != user::LOGGED_IN_GUEST) {
+    avatar_->SetImage(
+        ash::Shell::GetInstance()->tray_delegate()->GetUserImage(),
+        gfx::Size(kUserIconSize, kUserIconSize));
+    avatar_->SetVisible(true);
+  } else {
+    avatar_->SetVisible(false);
+  }
+}
+
 void TrayUser::OnUserUpdate() {
   avatar_->SetImage(
       ash::Shell::GetInstance()->tray_delegate()->GetUserImage(),
       gfx::Size(kUserIconSize, kUserIconSize));
 }
 
 }  // namespace internal
 }  // namespace ash