It is time.

ui/views/repeat_controller.cc

-// 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.
-
-#include "ui/views/repeat_controller.h"
-
-using base::TimeDelta;
-
-namespace views {
-
-// The delay before the first and then subsequent repeats. Values taken from
-// XUL code: http://mxr.mozilla.org/seamonkey/source/layout/xul/base/src/nsRepeatService.cpp#52
-const int kInitialRepeatDelay = 250;
-const int kRepeatDelay = 50;
-
-///////////////////////////////////////////////////////////////////////////////
-// RepeatController, public:
-
-RepeatController::RepeatController(const base::Closure& callback)
-    : callback_(callback) {
-}
-
-RepeatController::~RepeatController() {
-}
-
-void RepeatController::Start() {
-  // The first timer is slightly longer than subsequent repeats.
-  timer_.Start(FROM_HERE, TimeDelta::FromMilliseconds(kInitialRepeatDelay),
-               this, &RepeatController::Run);
-}
-
-void RepeatController::Stop() {
-  timer_.Stop();
-}
-
-///////////////////////////////////////////////////////////////////////////////
-// RepeatController, private:
-
-void RepeatController::Run() {
-  timer_.Start(FROM_HERE, TimeDelta::FromMilliseconds(kRepeatDelay), this,
-               &RepeatController::Run);
-  callback_.Run();
-}
-
-}  // namespace views