Simplify code for VPN entries in system menu

ash/system/network/vpn_list_view.h

Index: ash/system/network/vpn_list_view.h
diff --git a/ash/system/network/vpn_list_view.h b/ash/system/network/vpn_list_view.h
index 23c0009e338a07240bddfeaca38eadd0b055d89b..e59c8d5b584abf4150fa9c1a135504938f227672 100644
--- a/ash/system/network/vpn_list_view.h
+++ b/ash/system/network/vpn_list_view.h
@@ -10,7 +10,6 @@
 
 #include "ash/system/network/network_list_view_base.h"
 #include "ash/system/network/vpn_list.h"
-#include "ash/system/tray/view_click_listener.h"
 #include "base/macros.h"
 #include "chromeos/network/network_state_handler.h"
 
@@ -40,9 +39,7 @@ class NetworkStateListDetailedView;
 // attempt. Clicking on the currently connected or connecting network shows its
 // configuration dialog. Clicking on a provider shows the provider's "add
 // network" dialog.
-class VPNListView : public NetworkListViewBase,
-                    public VpnList::Observer,
-                    public ViewClickListener {
+class VPNListView : public NetworkListViewBase, public VpnList::Observer {
  public:
   explicit VPNListView(tray::NetworkStateListDetailedView* detailed_view);
   ~VPNListView() override;
@@ -54,9 +51,6 @@ class VPNListView : public NetworkListViewBase,
   // VpnList::Observer:
   void OnVPNProvidersChanged() override;
 
-  // ViewClickListener:
-  void OnViewClicked(views::View* sender) override;
-
  private:
   // Adds a network to the list.
   void AddNetwork(const chromeos::NetworkState* network);