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

chrome/browser/task_manager/task_manager_background_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_BACKGROUND_RESOURCE_PROVIDER_H_
-#define CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_BACKGROUND_RESOURCE_PROVIDER_H_
-
-#include <map>
-
-#include "base/basictypes.h"
-#include "base/string16.h"
-#include "chrome/browser/task_manager/task_manager.h"
-#include "chrome/browser/task_manager/task_manager_render_resource.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-#include "ui/gfx/image/image_skia.h"
-
-class BackgroundContents;
-
-class TaskManagerBackgroundContentsResource
-    : public TaskManagerRendererResource {
- public:
-  TaskManagerBackgroundContentsResource(
-      BackgroundContents* background_contents,
-      const string16& application_name);
-  virtual ~TaskManagerBackgroundContentsResource();
-
-  // TaskManager::Resource methods:
-  virtual string16 GetTitle() const OVERRIDE;
-  virtual string16 GetProfileName() const OVERRIDE;
-  virtual gfx::ImageSkia GetIcon() const OVERRIDE;
-  virtual bool IsBackground() const OVERRIDE;
-
-  const string16& application_name() const { return application_name_; }
- private:
-  BackgroundContents* background_contents_;
-
-  string16 application_name_;
-
-  // The icon painted for BackgroundContents.
-  // TODO(atwilson): Use the favicon when there's a way to get the favicon for
-  // BackgroundContents.
-  static gfx::ImageSkia* default_icon_;
-
-  DISALLOW_COPY_AND_ASSIGN(TaskManagerBackgroundContentsResource);
-};
-
-class TaskManagerBackgroundContentsResourceProvider
-    : public TaskManager::ResourceProvider,
-      public content::NotificationObserver {
- public:
-  explicit TaskManagerBackgroundContentsResourceProvider(
-      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::NotificationObserver method:
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
- private:
-  virtual ~TaskManagerBackgroundContentsResourceProvider();
-
-  void Add(BackgroundContents* background_contents, const string16& title);
-  void Remove(BackgroundContents* background_contents);
-
-  void AddToTaskManager(BackgroundContents* background_contents,
-                        const string16& title);
-
-  // Whether we are currently reporting to the task manager. Used to ignore
-  // notifications sent after StopUpdating().
-  bool updating_;
-
-  TaskManager* task_manager_;
-
-  // Maps the actual resources (the BackgroundContents) to the Task Manager
-  // resources.
-  typedef std::map<BackgroundContents*, TaskManagerBackgroundContentsResource*>
-      Resources;
-  Resources resources_;
-
-  // A scoped container for notification registries.
-  content::NotificationRegistrar registrar_;
-
-  DISALLOW_COPY_AND_ASSIGN(TaskManagerBackgroundContentsResourceProvider);
-};
-
-#endif  // CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_BACKGROUND_RESOURCE_PROVIDER_H_