Create task_manager namespace and wrap classes related to TaskManager with it.

chrome/browser/task_manager/task_manager_child_process_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_TASK_MANAGER_CHILD_PROCESS_RESOURCE_PROVIDER_H_
-#define CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_CHILD_PROCESS_RESOURCE_PROVIDER_H_
-
-#include <map>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "chrome/browser/task_manager/task_manager.h"
-#include "content/public/browser/browser_child_process_observer.h"
-#include "content/public/browser/notification_registrar.h"
-
-class TaskManagerChildProcessResource;
-
-namespace content {
-struct ChildProcessData;
-}
-
-class TaskManagerChildProcessResourceProvider
-    : public TaskManager::ResourceProvider,
-      public content::BrowserChildProcessObserver {
- public:
-  explicit TaskManagerChildProcessResourceProvider(TaskManager* task_manager);
-
-  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 methods:
-  virtual void BrowserChildProcessHostConnected(
-      const content::ChildProcessData& data) OVERRIDE;
-  virtual void BrowserChildProcessHostDisconnected(
-      const content::ChildProcessData& data) OVERRIDE;
-
- private:
-  virtual ~TaskManagerChildProcessResourceProvider();
-
-  // Retrieves information about the running ChildProcessHosts (performed in the
-  // IO thread).
-  virtual void RetrieveChildProcessData();
-
-  // Notifies the UI thread that the ChildProcessHosts information have been
-  // retrieved.
-  virtual void ChildProcessDataRetreived(
-      const std::vector<content::ChildProcessData>& child_processes);
-
-  void AddToTaskManager(const content::ChildProcessData& child_process_data);
-
-  TaskManager* task_manager_;
-
-  // Whether we are currently reporting to the task manager. Used to ignore
-  // notifications sent after StopUpdating().
-  bool updating_;
-
-  // Maps the actual resources (the ChildProcessData) to the Task Manager
-  // resources.
-  typedef std::map<base::ProcessHandle, TaskManagerChildProcessResource*>
-      ChildProcessMap;
-  ChildProcessMap resources_;
-
-  // Maps the pids to the resources (used for quick access to the resource on
-  // byte read notifications).
-  typedef std::map<int, TaskManagerChildProcessResource*> PidResourceMap;
-  PidResourceMap pid_to_resources_;
-
-  // A scoped container for notification registries.
-  content::NotificationRegistrar registrar_;
-
-  DISALLOW_COPY_AND_ASSIGN(TaskManagerChildProcessResourceProvider);
-};
-
-#endif  // CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_CHILD_PROCESS_RESOURCE_PROVIDER_H_