Adding Baseframework of the ResourceManager (all hooks and observers) are being put in place with a…

athena/activity/public/activity_manager.h

Index: athena/activity/public/activity_manager.h
diff --git a/athena/activity/public/activity_manager.h b/athena/activity/public/activity_manager.h
index eec59cafa0ef63cdcf810d9ca5b499d8c4aa8d77..1715cf70fa5479ecb8c42439e117065c65a753f0 100644
--- a/athena/activity/public/activity_manager.h
+++ b/athena/activity/public/activity_manager.h
@@ -10,6 +10,7 @@
 namespace athena {
 
 class Activity;
+class ActivityManagerObserver;
 
 // Manages a set of activities.
 class ATHENA_EXPORT ActivityManager {
@@ -26,6 +27,9 @@ class ATHENA_EXPORT ActivityManager {
 
   // Updates the UI when the task color/title changes.
   virtual void UpdateActivity(Activity* activity) = 0;
+
+  virtual void AddObserver(ActivityManagerObserver* observer) = 0;
+  virtual void RemoveObserver(ActivityManagerObserver* observer) = 0;
 };
 
 }  // namespace athena