Notify Files App when ARC++ app is installed/removed

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/memory/ptr_util.h"
 #include "base/sequenced_task_runner.h"
@@ skipping 48 matching lines @@
 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) {
+  observer_list_.AddObserver(observer);
+}
+
+void ArcServiceManager::RemoveObserver(Observer* observer) {
+  observer_list_.RemoveObserver(observer);
+}
+
+void ArcServiceManager::OnAppsUpdated() {
+  for (auto& observer : observer_list_)
+    observer.OnAppsUpdated();
+}
+
 void ArcServiceManager::Shutdown() {
   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