app_list: Show apps grid after installing from cws result.

ui/app_list/search_result_list_view_delegate.h

Index: ui/app_list/search_result_list_view_delegate.h
diff --git a/ui/app_list/search_result_list_view_delegate.h b/ui/app_list/search_result_list_view_delegate.h
index 097c6120003d0cad9e252d3079a96dcf341b670d..7b64448803fce06f65f8f794041b4328da0e8182 100644
--- a/ui/app_list/search_result_list_view_delegate.h
+++ b/ui/app_list/search_result_list_view_delegate.h
@@ -25,6 +25,9 @@ class APP_LIST_EXPORT SearchResultListViewDelegate {
                                   int action_index,
                                   int event_flags) = 0;
 
+  // Called when the app represented by |result| is installed.
+  virtual void OnResultInstalled(SearchResult* result) = 0;
+
  protected:
   virtual ~SearchResultListViewDelegate() {}
 };