Introduce ArcServiceManager::OnShutdown().

components/arc/arc_service_manager.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 "components/arc/arc_service_manager.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
@@ skipping 65 matching lines @@
 }
 
 // static
 ArcServiceManager* ArcServiceManager::Get() {
   if (!g_arc_service_manager)
     return nullptr;
   DCHECK(g_arc_service_manager->thread_checker_.CalledOnValidThread());
   return g_arc_service_manager;
 }
 
-// static
-bool ArcServiceManager::IsInitialized() {
-  if (!g_arc_service_manager)
-    return false;
-  DCHECK(g_arc_service_manager->thread_checker_.CalledOnValidThread());
-  return true;
-}
-
 ArcBridgeService* ArcServiceManager::arc_bridge_service() {
   DCHECK(thread_checker_.CalledOnValidThread());
   return arc_bridge_service_.get();
 }
 
 void ArcServiceManager::AddService(std::unique_ptr<ArcService> service) {
   DCHECK(thread_checker_.CalledOnValidThread());
   services_.emplace_back(std::move(service));
 }
 
 void ArcServiceManager::AddObserver(Observer* observer) {
   DCHECK(thread_checker_.CalledOnValidThread());
   observer_list_.AddObserver(observer);
 }
 
 void ArcServiceManager::RemoveObserver(Observer* observer) {
   DCHECK(thread_checker_.CalledOnValidThread());
   observer_list_.RemoveObserver(observer);
 }
 
 void ArcServiceManager::Shutdown() {
   DCHECK(thread_checker_.CalledOnValidThread());
+
+  // Before actual shutdown, notify observers for clean up.
+  for (auto& observer : observer_list_)
+    observer.OnArcShutdown();
+
   icon_loader_ = nullptr;
   activity_resolver_ = nullptr;
   services_.clear();
   arc_bridge_service_->OnShutdown();
 }
 
 // static
 void ArcServiceManager::SetArcBridgeServiceForTesting(
     std::unique_ptr<ArcBridgeService> arc_bridge_service) {
   if (g_arc_bridge_service_for_testing)
     delete g_arc_bridge_service_for_testing;
   g_arc_bridge_service_for_testing = arc_bridge_service.release();
 }
 
 }  // namespace arc