1 files changed, 30 insertions, 0 deletions
diff --git a/chrome/common/hi_res_timer_manager.h b/chrome/common/hi_res_timer_manager.h
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+++ b/chrome/common/hi_res_timer_manager.h
@@ -0,0 +1,30 @@
+// 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 CHROME_COMMON_HI_RES_TIMER_MANAGER_H_
+#define CHROME_COMMON_HI_RES_TIMER_MANAGER_H_
+#pragma once
+
+#include "ui/base/system_monitor/system_monitor.h"
+
+// Ensures that the Windows high resolution timer is only used
+// when not running on battery power.
+class HighResolutionTimerManager : public ui::SystemMonitor::PowerObserver {
+ public:
+  HighResolutionTimerManager();
+  virtual ~HighResolutionTimerManager();
+
+  // ui::SystemMonitor::PowerObserver:
+  virtual void OnPowerStateChange(bool on_battery_power);
+
+ private:
+  // Enable or disable the faster multimedia timer.
+  void UseHiResClock(bool use);
+
+  bool hi_res_clock_used_;
+
+  DISALLOW_COPY_AND_ASSIGN(HighResolutionTimerManager);
+};
+
+#endif  // CHROME_COMMON_HI_RES_TIMER_MANAGER_H_