Add chrome.usb.listInterfaces API

chrome/test/data/extensions/api_test/usb/list_interfaces/test.js

Index: chrome/test/data/extensions/api_test/usb/list_interfaces/test.js
diff --git a/chrome/test/data/extensions/api_test/usb/list_interfaces/test.js b/chrome/test/data/extensions/api_test/usb/list_interfaces/test.js
new file mode 100644
index 0000000000000000000000000000000000000000..7234d40ae363406178f0053ffca1c97528c35304
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/usb/list_interfaces/test.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2013 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.
+
+var usb = chrome.usb;
+
+var tests = [
+  function listInterfaces() {
+    usb.findDevices({vendorId: 0, productId: 0}, function (devices) {
+      var device = devices[0];
+      usb.listInterfaces(device, function (result) {
+        chrome.test.succeed();
+      });
+    });
+  }
+];
+
+chrome.test.runTests(tests);