Add ash SessionStateDelegate

ash/wm/gestures/shelf_gesture_handler.cc

Index: ash/wm/gestures/shelf_gesture_handler.cc
diff --git a/ash/wm/gestures/shelf_gesture_handler.cc b/ash/wm/gestures/shelf_gesture_handler.cc
index a4e8737468c556e7a6128b384807c0545418353e..2fa79052b435f08162af21407f858ef94699a7a5 100644
--- a/ash/wm/gestures/shelf_gesture_handler.cc
+++ b/ash/wm/gestures/shelf_gesture_handler.cc
@@ -5,11 +5,11 @@
 #include "ash/wm/gestures/shelf_gesture_handler.h"
 
 #include "ash/root_window_controller.h"
+#include "ash/session_state_delegate.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_types.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
-#include "ash/shell_delegate.h"
 #include "ash/system/status_area_widget.h"
 #include "ash/wm/gestures/tray_gesture_handler.h"
 #include "ash/wm/window_util.h"
@@ -31,8 +31,8 @@ ShelfGestureHandler::~ShelfGestureHandler() {
 
 bool ShelfGestureHandler::ProcessGestureEvent(const ui::GestureEvent& event) {
   Shell* shell = Shell::GetInstance();
-  if (!shell->delegate()->IsUserLoggedIn() ||
-      shell->delegate()->IsScreenLocked()) {
+  if (!shell->session_state_delegate()->HasActiveUser() ||
+      shell->session_state_delegate()->IsScreenLocked()) {
     // The gestures are disabled in the lock/login screen.
     return false;
   }