Remove balloon notification code. The last user was the Linux GTK port but that's deleted now.

chrome/browser/task_manager/notification_resource_provider.h

-// Copyright 2013 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_NOTIFICATION_RESOURCE_PROVIDER_H_
-#define CHROME_BROWSER_TASK_MANAGER_NOTIFICATION_RESOURCE_PROVIDER_H_
-
-#include <map>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "chrome/browser/task_manager/resource_provider.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-
-class BalloonHost;
-class TaskManager;
-
-namespace task_manager {
-
-class NotificationResource;
-
-class NotificationResourceProvider : public ResourceProvider,
-                                     public content::NotificationObserver {
- public:
-  static NotificationResourceProvider* Create(TaskManager* task_manager);
-
-  // ResourceProvider interface
-  virtual Resource* GetResource(int origin_pid,
-                                int child_id,
-                                int route_id) OVERRIDE;
-  virtual void StartUpdating() OVERRIDE;
-  virtual void StopUpdating() OVERRIDE;
-
-  // content::NotificationObserver interface
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
- private:
-  explicit NotificationResourceProvider(TaskManager* task_manager);
-  virtual ~NotificationResourceProvider();
-
-  void AddToTaskManager(BalloonHost* balloon_host);
-  void RemoveFromTaskManager(BalloonHost* balloon_host);
-
-  TaskManager* task_manager_;
-
-  // Maps the actual resources (BalloonHost*) to the Task Manager resources.
-  std::map<BalloonHost*, NotificationResource*> resources_;
-
-  // A scoped container for notification registries.
-  content::NotificationRegistrar registrar_;
-
-  bool updating_;
-
-  DISALLOW_COPY_AND_ASSIGN(NotificationResourceProvider);
-};
-
-}  // namespace task_manager
-
-#endif  // CHROME_BROWSER_TASK_MANAGER_NOTIFICATION_RESOURCE_PROVIDER_H_