Support toggling Wi-Fi with keyboard shortcut.

chrome/browser/chromeos/system/ash_system_tray_delegate.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/chromeos/system/ash_system_tray_delegate.h"
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/system/audio/audio_observer.h"
 #include "ash/system/bluetooth/bluetooth_observer.h"
@@ skipping 671 matching lines @@
     chrome::ShowSettingsSubPage(GetAppropriateBrowser(),
                                 chrome::kBluetoothAddDeviceSubPage);
   }
 
   virtual void ToggleAirplaneMode() OVERRIDE {
     NetworkLibrary* crosnet = CrosLibrary::Get()->GetNetworkLibrary();
     crosnet->EnableOfflineMode(!crosnet->offline_mode());
   }
 
   virtual void ToggleWifi() OVERRIDE {
+    tray_->network_observer()->OnWillToggleWifi();
     network_menu_->ToggleWifi();
   }
 
   virtual void ToggleMobile() OVERRIDE {
     network_menu_->ToggleMobile();
   }
 
   virtual void ToggleBluetooth() OVERRIDE {
     bluetooth_adapter_->SetPowered(!bluetooth_adapter_->IsPowered(),
                                    base::Bind(&base::DoNothing),
@@ skipping 555 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(SystemTrayDelegate);
 };
 
 }  // namespace
 
 ash::SystemTrayDelegate* CreateSystemTrayDelegate(ash::SystemTray* tray) {
   return new chromeos::SystemTrayDelegate(tray);
 }
 
 }  // namespace chromeos