app_list: Show apps grid after installing from cws result.

ui/app_list/views/app_list_main_view.h

Index: ui/app_list/views/app_list_main_view.h
diff --git a/ui/app_list/views/app_list_main_view.h b/ui/app_list/views/app_list_main_view.h
index 0fd7761a84aa87f7b8aaf63322b3470e6361fc24..dc73e8b4b9ac64f7c15bb5b7a380aa77baf2e15d 100644
--- a/ui/app_list/views/app_list_main_view.h
+++ b/ui/app_list/views/app_list_main_view.h
@@ -5,6 +5,8 @@
 #ifndef UI_APP_LIST_VIEWS_APP_LIST_MAIN_VIEW_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_MAIN_VIEW_H_
 
+#include <string>
+
 #include "base/memory/scoped_vector.h"
 #include "base/timer/timer.h"
 #include "ui/app_list/apps_grid_view_delegate.h"
@@ -82,6 +84,7 @@ class AppListMainView : public views::View,
   virtual void InvokeResultAction(SearchResult* result,
                                   int action_index,
                                   int event_flags) OVERRIDE;
+  virtual void OnResultInstalled(SearchResult* result) OVERRIDE;
 
   AppListViewDelegate* delegate_;
   AppListModel* model_;