Move signin status and current user information into AppListModel.

ui/app_list/cocoa/apps_search_box_controller.mm

Index: ui/app_list/cocoa/apps_search_box_controller.mm
diff --git a/ui/app_list/cocoa/apps_search_box_controller.mm b/ui/app_list/cocoa/apps_search_box_controller.mm
index 6d38f94c5c1ac5f0a3ce7414af81aee1eabcc247..0ed958879ea6f5c1eaf4ef50a9e315ba58112f01 100644
--- a/ui/app_list/cocoa/apps_search_box_controller.mm
+++ b/ui/app_list/cocoa/apps_search_box_controller.mm
@@ -373,7 +373,8 @@ void SearchBoxModelObserverBridge::TextChanged() {
     return;
 
   base::scoped_nsobject<NSView> customItemView([[CurrentUserMenuItemView alloc]
-      initWithDelegate:[[searchBoxController_ delegate] appListDelegate]]);
+      initWithCurrentUser:[[searchBoxController_ delegate] currentUserName]
+                userEmail:[[searchBoxController_ delegate] currentUserEmail]]);
   [[menu itemAtIndex:index] setView:customItemView];
 }