Replace base::CallbackList with base::ObserverList in CastConfigDelegate

chrome/browser/ui/ash/cast_config_delegate_chromeos.cc

 // Copyright 2015 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/ash/cast_config_delegate_chromeos.h"
 
 #include <stddef.h>
 #include <string>
 #include <utility>
 
@@ skipping 47 matching lines @@
 CastConfigDelegateChromeos::CastConfigDelegateChromeos() {
 }
 
 CastConfigDelegateChromeos::~CastConfigDelegateChromeos() {
 }
 
 bool CastConfigDelegateChromeos::HasCastExtension() const {
   return FindCastExtension() != nullptr;
 }
 
-CastConfigDelegateChromeos::DeviceUpdateSubscription
-CastConfigDelegateChromeos::RegisterDeviceUpdateObserver(
-    const ReceiversAndActivitesCallback& callback) {
-  auto listeners = extensions::CastDeviceUpdateListeners::Get(GetProfile());
-  return listeners->RegisterCallback(callback);
-}
-
 void CastConfigDelegateChromeos::RequestDeviceRefresh() {
   scoped_ptr<base::ListValue> args =
       extensions::api::cast_devices_private::UpdateDevicesRequested::Create();
   scoped_ptr<extensions::Event> event(new extensions::Event(
       extensions::events::CAST_DEVICES_PRIVATE_ON_UPDATE_DEVICES_REQUESTED,
       extensions::api::cast_devices_private::UpdateDevicesRequested::kEventName,
       std::move(args)));
   extensions::EventRouter::Get(GetProfile())
       ->DispatchEventToExtension(FindCastExtension()->id(), std::move(event));
 }
@@ skipping 28 matching lines @@
 void CastConfigDelegateChromeos::LaunchCastOptions() {
   chrome::NavigateParams params(
       ProfileManager::GetActiveUserProfile(),
       FindCastExtension()->GetResourceURL("options.html"),
       ui::PAGE_TRANSITION_LINK);
   params.disposition = NEW_FOREGROUND_TAB;
   params.window_action = chrome::NavigateParams::SHOW_WINDOW;
   chrome::Navigate(&params);
 }
 
+void CastConfigDelegateChromeos::AddObserver(
+    ash::CastConfigDelegate::Observer* observer) {
+  return extensions::CastDeviceUpdateListeners::Get(GetProfile())
+      ->AddObserver(observer);
+}
+
+void CastConfigDelegateChromeos::RemoveObserver(
+    ash::CastConfigDelegate::Observer* observer) {
+  return extensions::CastDeviceUpdateListeners::Get(GetProfile())
+      ->RemoveObserver(observer);
+}
+
 }  // namespace chromeos