App list: Remove search box menu (dead code).

ui/app_list/app_list_view_delegate_observer.h

Index: ui/app_list/app_list_view_delegate_observer.h
diff --git a/ui/app_list/app_list_view_delegate_observer.h b/ui/app_list/app_list_view_delegate_observer.h
index abc4fe4a42bfb0d86675160b0e658c415f1d9545..1e50e8aa4dcf3be458bbeacf9d211fd6fa19e12f 100644
--- a/ui/app_list/app_list_view_delegate_observer.h
+++ b/ui/app_list/app_list_view_delegate_observer.h
@@ -9,12 +9,9 @@
 
 namespace app_list {
 
+// TODO(mgiuca): Remove this class; it isn't used any more.
 class APP_LIST_EXPORT AppListViewDelegateObserver {
  public:
-  // Invoked when the Profiles shown on the app list change, or the active
-  // profile changes its signin status.
-  virtual void OnProfilesChanged() = 0;
-
   // Invoked on Chrome shutdown. This is only needed on Mac, since reference-
   // counting in Objective-C means that simply closing the window isn't enough
   // to guarantee references to Chrome objects are gone.