Move AppListModel::Users to AppListViewDelegate

ui/app_list/cocoa/app_list_view_controller.mm

Index: ui/app_list/cocoa/app_list_view_controller.mm
diff --git a/ui/app_list/cocoa/app_list_view_controller.mm b/ui/app_list/cocoa/app_list_view_controller.mm
index 5e5eea5c655882615797e73ef51209d7ac76ea6c..d9b4f54d7b28773fbcb639029f8bd0feca5c3ce3 100644
--- a/ui/app_list/cocoa/app_list_view_controller.mm
+++ b/ui/app_list/cocoa/app_list_view_controller.mm
@@ -88,7 +88,6 @@ class AppListModelObserverBridge : public AppListModelObserver {
 
  private:
   // Overridden from app_list::AppListModelObserver:
-  virtual void OnAppListModelUsersChanged() OVERRIDE;
   virtual void OnAppListModelSigninStatusChanged() OVERRIDE;
 
   AppListViewController* parent_;  // Weak. Owns us.
@@ -106,10 +105,6 @@ AppListModelObserverBridge::~AppListModelObserverBridge() {
   [[parent_ appsGridController] model]->RemoveObserver(this);
 }
 
-void AppListModelObserverBridge::OnAppListModelUsersChanged() {
-  [parent_ onSigninStatusChanged];
-}
-
 void AppListModelObserverBridge::OnAppListModelSigninStatusChanged() {
   [parent_ onSigninStatusChanged];
 }