[GRC] Coordination Unit Graph Observer

services/resource_coordinator/coordination_unit/coordination_unit_manager.h

Index: services/resource_coordinator/coordination_unit/coordination_unit_manager.h
diff --git a/services/resource_coordinator/coordination_unit/coordination_unit_manager.h b/services/resource_coordinator/coordination_unit/coordination_unit_manager.h
index 7d07f8bbdf5f2140bde0018f9d7a3bb46daa57d4..8d2900b367b992aa27477f04bb182c8f3ccf788d 100644
--- a/services/resource_coordinator/coordination_unit/coordination_unit_manager.h
+++ b/services/resource_coordinator/coordination_unit/coordination_unit_manager.h
@@ -5,6 +5,8 @@
 #ifndef SERVICES_RESOURCE_COORDINATOR_COORDINATION_UNIT_COORDINATION_UNIT_MANAGER_H_
 #define SERVICES_RESOURCE_COORDINATOR_COORDINATION_UNIT_COORDINATION_UNIT_MANAGER_H_
 
+#include <vector>
+
 #include "base/macros.h"
 
 namespace service_manager {
@@ -14,6 +16,9 @@ class ServiceContextRefFactory;
 
 namespace resource_coordinator {
 
+class CoordinationUnitImpl;
+class CoordinationUnitGraphObserver;
+
 // The CoordinationUnitManager is a singleton that encapsulates all
 // aspects of Coordination Units within the ResourceCoordinatorService.
 // All functionality for dealing with CoordinationUnits should be contained
@@ -25,8 +30,20 @@ class CoordinationUnitManager {
 
   void OnStart(service_manager::BinderRegistry* registry,
                service_manager::ServiceContextRefFactory* service_ref_factory);
+  void RegisterObserver(CoordinationUnitGraphObserver* observers);
+
+  void NotifyObserversCoordinationUnitCreated(
+      CoordinationUnitImpl* coordination_unit);
+  void NotifyObserversCoordinationUnitWillBeDestroyed(
+      CoordinationUnitImpl* coordination_unit);
+
+  // Allow tests to clear all observers so that they can isolate specific
+  // observers without having to worry about side effects from others.
+  void UnregisterAllObserversForTesting();
 
  private:
+  std::vector<CoordinationUnitGraphObserver*> observers_;

[Zhen Wang, 2017/06/15 20:07:53]

Use smart pointer instead of raw pointers:
https://www.chromium.org/developers/smart-pointer-guidelines

+
   static void Create(
       service_manager::ServiceContextRefFactory* service_ref_factory);