ARC: Implement SetWifiEnabledState API.

components/arc/net/arc_net_host_impl.h

Index: components/arc/net/arc_net_host_impl.h
diff --git a/components/arc/net/arc_net_host_impl.h b/components/arc/net/arc_net_host_impl.h
index ae7bb1b3c844cce5a0c2e1f1ecc589145e401fe5..f4c15f8061b396a7b4ff11f9d994bf23f1ae9077 100644
--- a/components/arc/net/arc_net_host_impl.h
+++ b/components/arc/net/arc_net_host_impl.h
@@ -46,6 +46,11 @@ class ArcNetHostImpl : public ArcService,
   void GetWifiEnabledState(
       const GetWifiEnabledStateCallback& callback) override;
 
+  // Called when a SetWifiEnabledState call is sent from ARC.
+  void SetWifiEnabledState(
+      bool is_enabled,
+      const SetWifiEnabledStateCallback& callback) override;
+
   // Called when a StartScan call is sent from ARC.
   void StartScan() override;