It is time.

ui/ozone/platform/dri/dri_vsync_provider.cc

-// Copyright 2014 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/ozone/platform/dri/dri_vsync_provider.h"
-
-#include "base/time/time.h"
-#include "ui/ozone/platform/dri/dri_window_delegate.h"
-#include "ui/ozone/platform/dri/hardware_display_controller.h"
-
-namespace ui {
-
-DriVSyncProvider::DriVSyncProvider(DriWindowDelegate* window_delegate)
-    : window_delegate_(window_delegate) {
-}
-
-DriVSyncProvider::~DriVSyncProvider() {}
-
-void DriVSyncProvider::GetVSyncParameters(const UpdateVSyncCallback& callback) {
-  HardwareDisplayController* controller = window_delegate_->GetController();
-  if (!controller)
-    return;
-
-  // The value is invalid, so we can't update the parameters.
-  if (controller->GetTimeOfLastFlip() == 0 ||
-      controller->get_mode().vrefresh == 0)
-    return;
-
-  // Stores the time of the last refresh.
-  base::TimeTicks timebase =
-      base::TimeTicks::FromInternalValue(controller->GetTimeOfLastFlip());
-  // Stores the refresh rate.
-  base::TimeDelta interval =
-      base::TimeDelta::FromSeconds(1) / controller->get_mode().vrefresh;
-
-  callback.Run(timebase, interval);
-}
-
-}  // namespace ui