Support toggling Wi-Fi with keyboard shortcut.

chrome/browser/chromeos/system/ash_system_tray_delegate.cc

Index: chrome/browser/chromeos/system/ash_system_tray_delegate.cc
diff --git a/chrome/browser/chromeos/system/ash_system_tray_delegate.cc b/chrome/browser/chromeos/system/ash_system_tray_delegate.cc
index f28867baa85986654352e70b9f980a4e236de086..9c7556a58a654865bd8244161f8b2aa8036cc8fb 100644
--- a/chrome/browser/chromeos/system/ash_system_tray_delegate.cc
+++ b/chrome/browser/chromeos/system/ash_system_tray_delegate.cc
@@ -689,7 +689,11 @@ class SystemTrayDelegate : public ash::SystemTrayDelegate,
   }
 
   virtual void ToggleWifi() OVERRIDE {
+    bool old_wifi_enabled = GetWifiEnabled();
     network_menu_->ToggleWifi();
+    // Use the old state to get the new state because Wi-Fi state is toggled
+    // asynchronously.
+    tray_->network_observer()->OnWifiToggled(!old_wifi_enabled);
   }
 
   virtual void ToggleMobile() OVERRIDE {