Roll IDL to Dartium37 (r181268)

modules/battery/BatteryManager.idl

Index: modules/battery/BatteryManager.idl
diff --git a/modules/battery/BatteryManager.idl b/modules/battery/BatteryManager.idl
new file mode 100644
index 0000000000000000000000000000000000000000..01a6ce1d7efe468d6c394e97d552600270c9c01c
--- /dev/null
+++ b/modules/battery/BatteryManager.idl
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+// Copyright 2014 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.
+
+// https://dvcs.w3.org/hg/dap/raw-file/tip/battery/Overview.html#batterymanager-interface
+[
+    RuntimeEnabled=BatteryStatus,
+    TypeChecking=Unrestricted,
+] interface BatteryManager : EventTarget {
+    readonly attribute boolean charging;
+    readonly attribute unrestricted double chargingTime;
+    readonly attribute unrestricted double dischargingTime;
+    readonly attribute double level;
+
+    attribute EventHandler onchargingchange;
+    attribute EventHandler onchargingtimechange;
+    attribute EventHandler ondischargingtimechange;
+    attribute EventHandler onlevelchange;
+};