ash uber tray: Add entry for power and date.

ash/system/power/power_supply_status.h

Index: ash/system/power/power_supply_status.h
diff --git a/ash/system/power/power_supply_status.h b/ash/system/power/power_supply_status.h
new file mode 100644
index 0000000000000000000000000000000000000000..c70101bb7d6622525001ac357ca51e7dac6facb1
--- /dev/null
+++ b/ash/system/power/power_supply_status.h
@@ -0,0 +1,33 @@
+// 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_POWER_POWER_SUPPLY_STATUS_H_
+#define ASH_SYSTEM_POWER_POWER_SUPPLY_STATUS_H_
+
+#include <string>
+
+#include "ash/ash_export.h"
+#include "base/basictypes.h"
+
+namespace ash {
+
+struct ASH_EXPORT PowerSupplyStatus {
+  bool line_power_on;
+
+  bool battery_is_present;
+  bool battery_is_full;
+
+  // Time in seconds until the battery is empty or full, 0 for unknown.
+  int64 battery_seconds_to_empty;
+  int64 battery_seconds_to_full;
+
+  double battery_percentage;
+
+  PowerSupplyStatus();
+  std::string ToString() const;
+};
+
+}  // namespace ash
+
+#endif  // ASH_SYSTEM_POWER_POWER_SUPPLY_STATUS_H_