Add support to Battery Status API in blink.

Source/modules/battery/BatteryManager.idl

Index: Source/modules/battery/BatteryManager.idl
diff --git a/Source/modules/vibration/NavigatorVibration.idl b/Source/modules/battery/BatteryManager.idl
similarity index 60%
copy from Source/modules/vibration/NavigatorVibration.idl
copy to Source/modules/battery/BatteryManager.idl
index 2c2c140706f3fd4ea5ab31a9824ce1fc22550e07..a742b52248718b2854cdd74a0a7a4170c03d2338 100644
--- a/Source/modules/vibration/NavigatorVibration.idl
+++ b/Source/modules/battery/BatteryManager.idl
@@ -1,5 +1,6 @@
 /*
  *  Copyright (C) 2012 Samsung Electronics
+ *  Copyright (C) 2014 Intel Corporation
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
@@ -17,9 +18,20 @@
  *  Boston, MA 02110-1301, USA.
  */
 
-partial interface Navigator {
-    // FIXME: The contents of the pattern argument should be clamped.
-    // See https://code.google.com/p/chromium/issues/detail?id=310138
-    boolean vibrate(sequence<unsigned long> pattern);
-    boolean vibrate([Clamp] unsigned long time);
+// http://dev.w3.org/2009/dap/system-info/battery-status.html
+[
+    NoInterfaceObject,
+    ActiveDOMObject,
+] interface BatteryManager : EventTarget {
+    readonly attribute boolean charging;
+    readonly attribute double chargingTime;
+    readonly attribute double dischargingTime;
+    readonly attribute double level;
+
+    attribute EventHandler onchargingchange;
+    attribute EventHandler onchargingtimechange;
+    attribute EventHandler ondischargingtimechange;
+    attribute EventHandler onlevelchange;
+
 };
+