ash uber tray: Add entry for power and date.

ash/system/power/power_supply_status.cc

+// 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.
+
+#include "ash/system/power/power_supply_status.h"
+
+#include "base/format_macros.h"
+#include "base/stringprintf.h"
+
+namespace ash {
+
+PowerSupplyStatus::PowerSupplyStatus()
+    : line_power_on(false),
+      battery_is_present(false),
+      battery_is_full(false),
+      battery_seconds_to_empty(0),
+      battery_seconds_to_full(0),
+      battery_percentage(0) {
+}
+
+std::string PowerSupplyStatus::ToString() const {
+  std::string result;
+  base::StringAppendF(&result,
+                      "line_power_on = %s ",
+                      line_power_on ? "true" : "false");
+  base::StringAppendF(&result,
+                      "battery_is_present = %s ",
+                      battery_is_present ? "true" : "false");
+  base::StringAppendF(&result,
+                      "battery_is_full = %s ",
+                      battery_is_full ? "true" : "false");
+  base::StringAppendF(&result,
+                      "battery_percentage = %f ",
+                      battery_percentage);
+  base::StringAppendF(&result,
+                      "battery_seconds_to_empty = %"PRId64" ",
+                      battery_seconds_to_empty);
+  base::StringAppendF(&result,
+                      "battery_seconds_to_full = %"PRId64" ",
+                      battery_seconds_to_full);
+  return result;
+}
+
+}  // namespace ash