Provide a callback for Component Updater OnDemand calls.

chrome/browser/ui/webui/components_ui.cc

 // Copyright 2013 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/webui/components_ui.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 141 matching lines @@
   component_updater::ComponentUpdateService* cus =
       g_browser_process->component_updater();
   if (cus)
     cus->RemoveObserver(this);
 }
 
 // static
 void ComponentsUI::OnDemandUpdate(const std::string& component_id) {
   component_updater::ComponentUpdateService* cus =
       g_browser_process->component_updater();
-  cus->GetOnDemandUpdater().OnDemandUpdate(component_id);
+  cus->GetOnDemandUpdater().OnDemandUpdate(
+      component_id,
+      component_updater::ComponentUpdateService::CompletionCallback());
 }
 
 // static
 base::ListValue* ComponentsUI::LoadComponents() {
   component_updater::ComponentUpdateService* cus =
       g_browser_process->component_updater();
   std::vector<std::string> component_ids;
   component_ids = cus->GetComponentIDs();
 
   // Construct DictionaryValues to return to UI.
@@ skipping 81 matching lines @@
     if (event == Events::COMPONENT_UPDATED) {
       auto* component_updater = g_browser_process->component_updater();
       update_client::CrxUpdateItem item;
       if (component_updater->GetComponentDetails(id, &item))
         parameters.SetString("version", item.component.version.GetString());
     }
     parameters.SetString("id", id);
   }
   web_ui()->CallJavascriptFunctionUnsafe("onComponentEvent", parameters);
 }