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

ash/shell.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/shell.h"
 
 #include <algorithm>
 #include <string>
 
 #include "ash/accelerators/focus_manager_factory.h"
@@ skipping 598 matching lines @@
 
   if (!cursor_manager_.IsCursorVisible()) {
     // Cursor might have been hidden by something other than chrome.
     // Let the first mouse event show the cursor.
     env_filter_->set_cursor_hidden_by_filter(true);
   }
 }
 
 void Shell::ShowContextMenu(const gfx::Point& location_in_screen) {
   // No context menus if there is no session with an active user.
-  if (!session_state_delegate_->HasActiveUser())
+  if (!session_state_delegate_->NumberOfLoggedInUsers())
     return;
   // No context menus when screen is locked.
   if (session_state_delegate_->IsScreenLocked())
     return;
 
   aura::RootWindow* root =
       wm::GetRootWindowMatching(gfx::Rect(location_in_screen, gfx::Size()));
   // TODO(oshima): The root and root window controller shouldn't be
   // NULL even for the out-of-bounds |location_in_screen| (It should
   // return the primary root). Investigate why/how this is
@@ skipping 317 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 // Shell, aura::client::ActivationChangeObserver implementation:
 
 void Shell::OnWindowActivated(aura::Window* gained_active,
                               aura::Window* lost_active) {
   if (gained_active)
     active_root_window_ = gained_active->GetRootWindow();
 }
 
 }  // namespace ash