Support toggling Wi-Fi with keyboard shortcut.

ash/system/network/tray_network.h

Index: ash/system/network/tray_network.h
diff --git a/ash/system/network/tray_network.h b/ash/system/network/tray_network.h
index 022446dce5fb03815f74cb82d6cf4122330c446c..f240099c4e3eee4d947654431afa11088b63fb82 100644
--- a/ash/system/network/tray_network.h
+++ b/ash/system/network/tray_network.h
@@ -12,6 +12,8 @@
 namespace ash {
 namespace internal {
 
+class TrayDetailsView;
+
 namespace tray {
 class NetworkDefaultView;
 class NetworkDetailedView;
@@ -49,6 +51,7 @@ class TrayNetwork : public SystemTrayItem,
                                const string16& message,
                                const string16& link_text) OVERRIDE;
   virtual void ClearNetworkError(ErrorType error_type) OVERRIDE;
+  virtual void OnWifiToggled(bool wifi_enabled) OVERRIDE;
 
  private:
   friend class tray::NetworkErrorView;
@@ -61,6 +64,7 @@ class TrayNetwork : public SystemTrayItem,
   tray::NetworkTrayView* tray_;
   tray::NetworkDefaultView* default_;
   tray::NetworkDetailedView* detailed_;
+  TrayDetailsView* wifi_view_;
   tray::NetworkNotificationView* notification_;
   scoped_ptr<tray::NetworkErrors> errors_;