Add ash SessionStateDelegate

ash/shell_delegate.h

Index: ash/shell_delegate.h
diff --git a/ash/shell_delegate.h b/ash/shell_delegate.h
index 99aeb6eb637e53fe206523fa1b61090651215092..0ff5fe6879b926e9c65ff3e554a7b4ea1b4d1f4c 100644
--- a/ash/shell_delegate.h
+++ b/ash/shell_delegate.h
@@ -45,6 +45,7 @@ class LauncherDelegate;
 class LauncherModel;
 struct LauncherItem;
 class RootWindowHostFactory;
+class SessionStateDelegate;
 class SystemTrayDelegate;
 class UserWallpaperDelegate;
 
@@ -98,15 +99,6 @@ class ASH_EXPORT ShellDelegate {
   // The Shell owns the delegate.
   virtual ~ShellDelegate() {}
 
-  // Returns true if user has logged in.
-  virtual bool IsUserLoggedIn() const = 0;
-
-  // Returns true if we're logged in and browser has been started
-  virtual bool IsSessionStarted() const = 0;
-
-  // Returns true if we're logged in as guest.
-  virtual bool IsGuestSession() const = 0;
-
   // Returns true if this is the first time that the shell has been run after
   // the system has booted.  false is returned after the shell has been
   // restarted, typically due to logging in as a guest or logging out.
@@ -118,19 +110,6 @@ class ASH_EXPORT ShellDelegate {
   // Returns true if we're running in forced app mode.
   virtual bool IsRunningInForcedAppMode() const = 0;
 
-  // Returns true if a user is logged in whose session can be locked (i.e. the
-  // user has a password with which to unlock the session).
-  virtual bool CanLockScreen() const = 0;
-
-  // Invoked when a user locks the screen.
-  virtual void LockScreen() = 0;
-
-  // Unlock the screen. Currently used only for tests.
-  virtual void UnlockScreen() = 0;
-
-  // Returns true if the screen is currently locked.
-  virtual bool IsScreenLocked() const = 0;
-
   // Called before processing |Shell::Init()| so that the delegate
   // can perform tasks necessary before the shell is initialized.
   virtual void PreInit() = 0;
@@ -226,6 +205,9 @@ class ASH_EXPORT ShellDelegate {
   // Creates a caps lock delegate. Shell takes ownership of the delegate.
   virtual CapsLockDelegate* CreateCapsLockDelegate() = 0;
 
+  // Creates a session state delegate. Shell takes ownership of the delegate.
+  virtual SessionStateDelegate* CreateSessionStateDelegate() = 0;
+
   // Creates a user action client. Shell takes ownership of the object.
   virtual aura::client::UserActionClient* CreateUserActionClient() = 0;