It is time.

ui/views/repeat_controller.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 UI_VIEWS_REPEAT_CONTROLLER_H_
-#define UI_VIEWS_REPEAT_CONTROLLER_H_
-
-#include "base/callback.h"
-#include "base/timer/timer.h"
-
-namespace views {
-
-///////////////////////////////////////////////////////////////////////////////
-//
-// RepeatController
-//
-//  An object that handles auto-repeating UI actions. There is a longer initial
-//  delay after which point repeats become constant. Users provide a callback
-//  that is notified when each repeat occurs so that they can perform the
-//  associated action.
-//
-///////////////////////////////////////////////////////////////////////////////
-class RepeatController {
- public:
-  // The RepeatController takes ownership of this callback object.
-  explicit RepeatController(const base::Closure& callback);
-  virtual ~RepeatController();
-
-  // Start repeating.
-  void Start();
-
-  // Stop repeating.
-  void Stop();
-
- private:
-  // Called when the timer expires.
-  void Run();
-
-  // The current timer.
-  base::OneShotTimer<RepeatController> timer_;
-
-  base::Closure callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(RepeatController);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_REPEAT_CONTROLLER_H_