Add the Play Store app search to the launcher.

chrome/browser/ui/app_list/search/arc_app_result.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/app_list/search/arc_app_result.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/app_list/app_list_controller_delegate.h"
 #include "chrome/browser/ui/app_list/arc/arc_app_context_menu.h"
 #include "chrome/browser/ui/app_list/arc/arc_app_icon_loader.h"
@@ skipping 48 matching lines @@
       base::MakeUnique<ArcAppResult>(profile(), app_id(), controller(),
                                      display_type() == DISPLAY_RECOMMENDATION);
   copy->set_title(title());
   copy->set_title_tags(title_tags());
   copy->set_relevance(relevance());
 
   return copy;
 }
 
 ui::MenuModel* ArcAppResult::GetContextMenuModel() {
-  context_menu_.reset(new ArcAppContextMenu(
-      this, profile(), app_id(), controller()));
+  if (!context_menu_) {
+    context_menu_.reset(
+        new ArcAppContextMenu(this, profile(), app_id(), controller()));
+  }
   return context_menu_->GetMenuModel();
 }
 
 }  // namespace app_list