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

chrome/browser/ui/ash/session_state_delegate.h

 // Copyright (c) 2013 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 CHROME_BROWSER_UI_ASH_SESSION_STATE_DELEGATE_H_
 #define CHROME_BROWSER_UI_ASH_SESSION_STATE_DELEGATE_H_
 
 #include "ash/session_state_delegate.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 
 class SessionStateDelegate : public ash::SessionStateDelegate {
  public:
   SessionStateDelegate();
   virtual ~SessionStateDelegate();
 
   // ash::SessionStateDelegate:
-  virtual bool HasActiveUser() const OVERRIDE;

[Nikita (slow), 2013/05/17 17:00:31]

nit: I would prefer to keep this method is possible for shorter calls in places
where you only need to check whether there's at least one active user but I'm
not insisting.

Internally it could be implemented as return NumberOfLoggedInUsers();

+  virtual int NumberOfLoggedInUsers() const OVERRIDE;
   virtual bool IsActiveUserSessionStarted() const OVERRIDE;
   virtual bool CanLockScreen() const OVERRIDE;
   virtual bool IsScreenLocked() const OVERRIDE;
   virtual void LockScreen() OVERRIDE;
   virtual void UnlockScreen() OVERRIDE;
+  virtual const base::string16 GetUserDisplayName(
+      ash::MultiProfileIndex index) const OVERRIDE;
+  virtual const std::string GetUserEmail(
+      ash::MultiProfileIndex index) const OVERRIDE;
+  virtual const gfx::ImageSkia& GetUserImage(
+      ash::MultiProfileIndex index) const OVERRIDE;
+  virtual void GetLoggedInUsers(ash::UserEmailList* users) OVERRIDE;
+  virtual void SwitchActiveUser(const std::string& email) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SessionStateDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_SESSION_STATE_DELEGATE_H_