diff -r 000000000000 -r 6474c204b198 dom/system/gonk/nsIVolumeService.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/system/gonk/nsIVolumeService.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,37 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+#include "nsIVolume.idl"
+#include "nsIVolumeMountLock.idl"
+
+%{C++
+#include "nsTArray.h"
+#include "nsString.h"
+%}
+[ref] native nsStringTArrayRef(nsTArray<nsString>);
+
+[scriptable, uuid(a3b110cd-74f2-43cb-84c6-2a87713f2774)]
+interface nsIVolumeService : nsISupports
+{
+    nsIVolume getVolumeByName(in DOMString volName);
+    nsIVolume getVolumeByPath(in DOMString path);
+    nsIVolume createOrGetVolumeByPath(in DOMString path);
+
+    void BroadcastVolume(in DOMString volName);
+
+    nsIVolumeMountLock createMountLock(in DOMString volName);
+
+    [noscript] void getVolumeNames(in nsStringTArrayRef aVolNames);
+
+    /* for test case only to simulate sdcard insertion/removal */
+    void createFakeVolume(in DOMString name, in DOMString path);
+    void SetFakeVolumeState(in DOMString name, in long state);
+};
+
+%{C++
+#define NS_VOLUMESERVICE_CID \
+  {0x7c179fb7, 0x67a0, 0x43a3, {0x93, 0x37, 0x29, 0x4e, 0x03, 0x60, 0xb8, 0x58}}
+#define NS_VOLUMESERVICE_CONTRACTID "@mozilla.org/telephony/volume-service;1"
+%}