ARC: Implement SetWifiEnabledState API.

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,
@@ skipping 29 matching lines @@
 
   // Sends a request to get enabled / disabled status of WiFi.
   GetWifiEnabledState@1() => (bool is_enabled);
 
   // Sends a request to start scan of WiFi APs.
   [MinVersion=1] StartScan@2();
 
   // Sends a request to get configured or visible WiFi networks based on the
   // request type.
   [MinVersion=2] GetNetworks@3(GetNetworksRequestType type) => (NetworkData data);
+
+  // Sends a request to enable or disable WiFi.
+  [MinVersion=3] SetWifiEnabledState@4(bool is_enabled) => (bool result);

[hidehiko, 2016/03/16 00:45:58]

As |result| is not actually if "setting is succeeded or not" as discussed (in
terms of setting wifi state error handling), could you add detailed comment
about it?

 };
 
 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();
 };