ARC: Add network GUID to the metadata that is sent to the Host.

components/arc/common/net.mojom

 // Copyright 2015 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.
 
 module arc;
 
 [Extensible]
 enum NetworkResult {
   SUCCESS = 0,
   FAILURE = 1,
 };
 
 [Extensible]
 enum GetNetworksRequestType {
   CONFIGURED_ONLY = 0,
   VISIBLE_ONLY = 1,
 };
 
 struct WifiConfiguration {
   // These correspond to ONC properties returned by
   // chrome.networkingPrivate.getNetworks().
   // See components/onc/docs/onc_spec.html
   string ssid;
   int32 frequency;
   int32 signal_strength;
   string bssid;
   string security;
+  [MinVersion=1] string? guid;
 };
 
 struct NetworkData {
   NetworkResult status;
   array<WifiConfiguration> networks;
 };
 
 interface NetHost {
   // Sends a request to get configured or visible WiFi networks based on the
   // |configured_only| and |visible_only| flags.
@@ skipping 10 matching lines @@
   [MinVersion=2] GetNetworks@3(GetNetworksRequestType type) => (NetworkData data);
 };
 
 interface NetInstance {
   // Establishes full-duplex communication with the host.
   Init@0(NetHost host_ptr);
 
   // Notifies the instance of a WiFI AP scan being completed.
   [MinVersion=1] ScanCompleted@1();
 };