content: convert child process notifications to observer usage

chrome/browser/task_manager/task_manager_worker_resource_provider.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_WORKER_RESOURCE_PROVIDER_H_
 #define CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_WORKER_RESOURCE_PROVIDER_H_
 
 #include <map>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "chrome/browser/task_manager/task_manager.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/browser_child_process_observer.h"
 #include "content/public/browser/worker_service_observer.h"
 
 class TaskManagerSharedWorkerResource;
 
 class TaskManagerWorkerResourceProvider
     : public TaskManager::ResourceProvider,
-      private content::WorkerServiceObserver,
-      private content::NotificationObserver {
+      public content::BrowserChildProcessObserver,
+      private content::WorkerServiceObserver {
  public:
   explicit TaskManagerWorkerResourceProvider(TaskManager* task_manager);
 
  private:
   class WorkerResourceListHolder;
   typedef std::vector<TaskManagerSharedWorkerResource*> WorkerResourceList;
   typedef scoped_ptr<TaskManagerSharedWorkerResource> WorkerResourceHolder;
   typedef std::map<int, WorkerResourceList> ProcessIdToWorkerResources;
 
   virtual ~TaskManagerWorkerResourceProvider();
 
   // TaskManager::ResourceProvider implementation.
   virtual TaskManager::Resource* GetResource(int origin_pid,
                                              int render_process_host_id,
                                              int routing_id) OVERRIDE;
   virtual void StartUpdating() OVERRIDE;
   virtual void StopUpdating() OVERRIDE;
 
+  // content::BrowserChildProcessObserver implementation.
+  virtual void BrowserChildProcessHostConnected(
+      const content::ChildProcessData& data) OVERRIDE;
+  virtual void BrowserChildProcessHostDisconnected(
+      const content::ChildProcessData& data) OVERRIDE;
+
   // content::WorkerServiceObserver implementation.
   virtual void WorkerCreated(const GURL& url,
                              const string16& name,
                              int process_id,
                              int route_id) OVERRIDE;
   virtual void WorkerDestroyed(int process_id, int route_id) OVERRIDE;
 
-  // content::NotificationObserver implementation.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
   void NotifyWorkerCreated(WorkerResourceHolder* resource_holder);
   void NotifyWorkerDestroyed(int process_id, int routing_id);
 
   void StartObservingWorkers();
   void StopObservingWorkers();
 
   void AddWorkerResourceList(WorkerResourceListHolder* resource_list_holder);
   void AddResource(TaskManagerSharedWorkerResource* resource);
   void DeleteAllResources();
 
   bool updating_;
   TaskManager* task_manager_;
   WorkerResourceList resources_;
   // Map from worker process id to the list of its workers. This list contains
   // entries for worker processes which has not launched yet but for which we
   // have already received WorkerCreated event. We don't add such workers to
   // the task manager until the process is launched.
   ProcessIdToWorkerResources launching_workers_;
-  content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskManagerWorkerResourceProvider);
 };
 
 #endif  // CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_WORKER_RESOURCE_PROVIDER_H_