Update app list search box menu when Users changes

ui/app_list/views/search_box_view.h

Index: ui/app_list/views/search_box_view.h
diff --git a/ui/app_list/views/search_box_view.h b/ui/app_list/views/search_box_view.h
index ad12ede57b18a8789855935ef9a176859e332c13..bafc6faa30764aa411acfdbce8d8bd1053ff700e 100644
--- a/ui/app_list/views/search_box_view.h
+++ b/ui/app_list/views/search_box_view.h
@@ -7,6 +7,7 @@
 
 #include <string>
 
+#include "ui/app_list/app_list_view_delegate_observer.h"
 #include "ui/app_list/search_box_model_observer.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/controls/button/menu_button_listener.h"
@@ -35,6 +36,7 @@ class SearchBoxView : public views::View,
                       public views::TextfieldController,
                       public views::ButtonListener,
                       public views::MenuButtonListener,
+                      public AppListViewDelegateObserver,
                       public SearchBoxModelObserver {
  public:
   SearchBoxView(SearchBoxViewDelegate* delegate,
@@ -86,6 +88,9 @@ class SearchBoxView : public views::View,
   virtual void SelectionModelChanged() OVERRIDE;
   virtual void TextChanged() OVERRIDE;
 
+  // Overridden from AppListViewDelegateObserver:
+  virtual void OnUsersChanged() OVERRIDE;
+
   SearchBoxViewDelegate* delegate_;  // Not owned.
   AppListViewDelegate* view_delegate_;  // Not owned.
   AppListModel* model_;  // Owned by AppListView.