Add queryForNewLocalDevices to gcdPrivate

chrome/common/extensions/api/gcd_private.idl

 // 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.
 
 // Use the <code>chrome.gcdPrivate</code> API to discover GCD APIs and register
 // them.
 namespace gcdPrivate {
 
   enum SetupType { mdns, wifi, cloud };
 
@@ skipping 22 matching lines @@
   dictionary WiFiCredentials {
     DOMString ssid;
     DOMString password;
   };
 
   callback CloudDeviceListCallback = void(GCDDevice[] devices);
 
   interface Functions {
     static void getCloudDeviceList(CloudDeviceListCallback callback);
 
+    // Call this function *only* after registering for onDeviceStateChanged
+    // events, or it will do nothing. This will trigger an
+    // onLocalDeviceStateChanged event per device.
+    static void queryForNewLocalDevices();
+
     // Starts device setup process. Returns id of setup process. Id should be
     // used as |setupId| in all subsequent setup related calls, and for
     // filtering setup events.
     static long startSetup(GCDDevice device);
 
     // Sets WiFi network list as reply to |onGetWifiNetworks| event.
     // |setupId| : The value returned by |startSetup|.
     // |networks| : The list of network device should be registered on.
     static void setWiFiNetworks(long setupId, DOMString[] networks);
 
@@ skipping 43 matching lines @@
 
     // Notifies app that setup is completed successfully.
     // |setupId| : The value returned by |startSetup|.
     static void onSetupSuccess(long setupId);
 
     // Notifies app that setup is failed or stoped.
     // |setupId| : The value returned by |startSetup|.
     static void onSetupError(long setupId);
   };
 };