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

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 847820d3ea71cfbdccdbd977e4b2038a2f64dc71..aba69fd9e803655ceafbb3cb91cd0cb5969c96fc 100644
--- a/ash/wm/gestures/shelf_gesture_handler.cc
+++ b/ash/wm/gestures/shelf_gesture_handler.cc
@@ -31,7 +31,7 @@ ShelfGestureHandler::~ShelfGestureHandler() {
 
 bool ShelfGestureHandler::ProcessGestureEvent(const ui::GestureEvent& event) {
   Shell* shell = Shell::GetInstance();
-  if (!shell->session_state_delegate()->HasActiveUser() ||
+  if (!shell->session_state_delegate()->NumberOfLoggedInUsers() ||
       shell->session_state_delegate()->IsScreenLocked()) {
     // The gestures are disabled in the lock/login screen.
     return false;