app_list: Show apps grid after installing from cws result.

ash/wm/app_list_controller.h

Index: ash/wm/app_list_controller.h
diff --git a/ash/wm/app_list_controller.h b/ash/wm/app_list_controller.h
index 8aa7e3012a463c007ea176196136f95ca04740e0..ba36f8c9a4c24428ca801a1574492481207983d5 100644
--- a/ash/wm/app_list_controller.h
+++ b/ash/wm/app_list_controller.h
@@ -67,6 +67,10 @@ class AppListController : public ui::EventHandler,
   void SetDragAndDropHostOfCurrentAppList(
       app_list::ApplicationDragAndDropHost* drag_and_drop_host);
 
+  // Shows the apps grid regardless of whether there is a query. It's a no-op if
+  // there is no visible view.
+  void ShowAppsGrid();
+
  private:
   // Sets the app list view and attempts to show it.
   void SetView(app_list::AppListView* view);