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

chrome/browser/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_
+#ifndef CHROME_BROWSER_TASK_MANAGER_BACKGROUND_RESOURCE_PROVIDER_H_
+#define CHROME_BROWSER_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 "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 class BackgroundContents;
-class TaskManagerBackgroundContentsResource;
 
-class TaskManagerBackgroundContentsResourceProvider
+namespace task_manager {
+
+class BackgroundContentsResource;
+
+class BackgroundContentsResourceProvider
     : public TaskManager::ResourceProvider,
       public content::NotificationObserver {
  public:
-  explicit TaskManagerBackgroundContentsResourceProvider(
+  explicit BackgroundContentsResourceProvider(
       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();
+  virtual ~BackgroundContentsResourceProvider();
 
   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*>
+  typedef std::map<BackgroundContents*, BackgroundContentsResource*>
       Resources;
   Resources resources_;
 
   // A scoped container for notification registries.
   content::NotificationRegistrar registrar_;
 
-  DISALLOW_COPY_AND_ASSIGN(TaskManagerBackgroundContentsResourceProvider);
+  DISALLOW_COPY_AND_ASSIGN(BackgroundContentsResourceProvider);
 };
 
-#endif  // CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_BACKGROUND_RESOURCE_PROVIDER_H_
+}  // namespace task_manager
+
+#endif  // CHROME_BROWSER_TASK_MANAGER_BACKGROUND_RESOURCE_PROVIDER_H_