Adding new user menu section to the SystemTrayMenu & refactoring of user access

ash/root_window_controller.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/root_window_controller.h"
 
 #include <vector>
 
 #include "ash/ash_constants.h"
 #include "ash/ash_switches.h"
@@ skipping 263 matching lines @@
 
   // Create Panel layout manager
   aura::Window* panel_container = GetContainer(
       internal::kShellWindowId_PanelContainer);
   panel_layout_manager_ =
       new internal::PanelLayoutManager(panel_container);
   panel_container_handler_.reset(
       new ToplevelWindowEventHandler(panel_container));
   panel_container->SetLayoutManager(panel_layout_manager_);
 
-  if (Shell::GetInstance()->session_state_delegate()->HasActiveUser())
+  if (Shell::GetInstance()->session_state_delegate()->NumberOfLoggedInUsers())
     shelf_->CreateLauncher();
 
   InitKeyboard();
 }
 
 void RootWindowController::CreateContainers() {
   CreateContainersInRootWindow(root_window_.get());
 
   // Create touch observer HUD if needed. HUD should be created after the
   // containers have been created, so that its widget can be added to them.
@@ skipping 328 matching lines @@
       "OverlayContainer",
       lock_screen_related_containers);
   SetUsesScreenCoordinates(overlay_container);
 
   CreateContainer(kShellWindowId_PowerButtonAnimationContainer,
                   "PowerButtonAnimationContainer", root_window) ;
 }
 
 }  // namespace internal
 }  // namespace ash