Move timing files into base/time and base/timer, install forwarding headers.

BUG=254986
TEST=none
TBR=brettw@chromium.org

Review URL: https://codereview.chromium.org/18063004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@208951 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 38 insertions, 0 deletions

diff --git a/base/timer/hi_res_timer_manager.h b/base/timer/hi_res_timer_manager.h
new file mode 100644
index 0000000..7fcdb0d
--- /dev/null
+++ b/base/timer/hi_res_timer_manager.h
@@ -0,0 +1,38 @@
+// 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 BASE_TIMER_HI_RES_TIMER_MANAGER_H_
+#define BASE_TIMER_HI_RES_TIMER_MANAGER_H_
+
+#include "base/base_export.h"
+#include "base/basictypes.h"
+#include "base/power_monitor/power_observer.h"
+
+namespace base {
+
+// Ensures that the Windows high resolution timer is only used
+// when not running on battery power.
+class BASE_EXPORT HighResolutionTimerManager : public base::PowerObserver {
+ public:
+  HighResolutionTimerManager();
+  virtual ~HighResolutionTimerManager();
+
+  // base::PowerObserver method.
+  virtual void OnPowerStateChange(bool on_battery_power) OVERRIDE;
+
+  // Returns true if the hi resolution clock could be used right now.
+  bool hi_res_clock_available() const { return hi_res_clock_available_; }
+
+ private:
+  // Enable or disable the faster multimedia timer.
+  void UseHiResClock(bool use);
+
+  bool hi_res_clock_available_;
+
+  DISALLOW_COPY_AND_ASSIGN(HighResolutionTimerManager);
+};
+
+}  // namespace base
+
+#endif  // BASE_TIMER_HI_RES_TIMER_MANAGER_H_