[GRC] Coordination Unit Graph Observer

services/resource_coordinator/coordination_unit/coordination_unit_manager.cc

 // Copyright 2017 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 "services/resource_coordinator/coordination_unit/coordination_unit_manager.h"
 
+#include <memory>
+#include <utility>
+
 #include "base/bind.h"
 #include "base/bind_helpers.h"
+#include "base/macros.h"
+#include "services/resource_coordinator/coordination_unit/coordination_unit_graph_observer.h"
+#include "services/resource_coordinator/coordination_unit/coordination_unit_impl.h"
 #include "services/resource_coordinator/coordination_unit/coordination_unit_provider_impl.h"
+#include "services/resource_coordinator/public/cpp/coordination_unit_types.h"
 #include "services/service_manager/public/cpp/binder_registry.h"
 #include "services/service_manager/public/cpp/service_context.h"
 
 namespace resource_coordinator {
 
-class CoordinationUnitImpl;
-
 CoordinationUnitManager::CoordinationUnitManager() = default;
 
 CoordinationUnitManager::~CoordinationUnitManager() = default;
 
 void CoordinationUnitManager::OnStart(
     service_manager::BinderRegistry* registry,
     service_manager::ServiceContextRefFactory* service_ref_factory) {
   registry->AddInterface(base::Bind(&CoordinationUnitProviderImpl::Create,
-                                    base::Unretained(service_ref_factory)));
+                                    base::Unretained(service_ref_factory),
+                                    base::Unretained(this)));
+}
+
+void CoordinationUnitManager::RegisterObserver(
+    std::unique_ptr<CoordinationUnitGraphObserver> observer) {
+  observers_.push_back(std::move(observer));
+}
+
+void CoordinationUnitManager::NotifyObserversCoordinationUnitCreated(
+    CoordinationUnitImpl* coordination_unit) {
+  for (auto& observer : observers_) {
+    if (observer->ShouldObserve(coordination_unit)) {
+      observer->OnCoordinationUnitCreated(coordination_unit);
+    }
+  }
+}
+
+void CoordinationUnitManager::NotifyObserversCoordinationUnitWillBeDestroyed(
+    CoordinationUnitImpl* coordination_unit) {
+  coordination_unit->WillBeDestroyed();
 }
 
 }  // namespace resource_coordinator