CleanUp: Introduce UserInfo. Move session_state stuff to ash/session.

ash/session_state_observer.cc

Index: ash/session_state_observer.cc
diff --git a/ash/session_state_observer.cc b/ash/session_state_observer.cc
deleted file mode 100644
index 96b07710d3909d27b83f107cc71d934529d14ed0..0000000000000000000000000000000000000000
--- a/ash/session_state_observer.cc
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright 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.
-
-#include "ash/session_state_observer.h"
-
-#include "ash/session_state_delegate.h"
-#include "ash/shell.h"
-
-namespace ash {
-
-ScopedSessionStateObserver::ScopedSessionStateObserver(
-    ash::SessionStateObserver* observer) : observer_(observer) {
-  ash::Shell::GetInstance()->session_state_delegate()->
-      AddSessionStateObserver(observer_);
-}
-
-ScopedSessionStateObserver::~ScopedSessionStateObserver() {
-  ash::Shell::GetInstance()->session_state_delegate()->
-      RemoveSessionStateObserver(observer_);
-}
-
-}  // namespace ash
-