1 files changed, 23 insertions, 0 deletions
diff --git a/chromium/ash/system/date/clock_observer.h b/chromium/ash/system/date/clock_observer.h
new file mode 100644
index 00000000000..30465288bf7
--- /dev/null
+++ b/chromium/ash/system/date/clock_observer.h
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 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 ASH_SYSTEM_DATE_CLOCK_OBSERVER_H_
+#define ASH_SYSTEM_DATE_CLOCK_OBSERVER_H_
+
+namespace ash {
+
+class ClockObserver {
+ public:
+  virtual ~ClockObserver() {}
+
+  virtual void OnDateFormatChanged() = 0;
+  virtual void OnSystemClockTimeUpdated() = 0;
+
+  // Force a refresh (e.g. after the system is resumed).
+  virtual void Refresh() = 0;
+};
+
+};
+
+#endif  // ASH_SYSTEM_DATE_CLOCK_OBSERVER_H_