tray: Show warning in network tray when VPN or proxy used.

ash/system/network/network_list.h

 // Copyright 2016 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.
 
 #ifndef ASH_SYSTEM_NETWORK_NETWORK_LIST_H_
 #define ASH_SYSTEM_NETWORK_NETWORK_LIST_H_
 
 #include <map>
 #include <memory>
 #include <set>
@@ skipping 11 matching lines @@
 namespace views {
 class Label;
 class Separator;
 class View;
 }
 
 namespace ash {
 
 struct NetworkInfo;
 class NetworkListDelegate;
+class TriView;
 
 // A list of available networks of a given type. This class is used for all
 // network types except VPNs. For VPNs, see the |VPNList| class.
 class NetworkListView : public NetworkListViewBase,
                         public network_icon::AnimationObserver {
  public:
   class SectionHeaderRowView;
 
   explicit NetworkListView(NetworkListDelegate* delegate);
   ~NetworkListView() override;
@@ skipping 68 matching lines @@
   NetworkListDelegate* delegate_;
 
   views::Label* no_wifi_networks_view_;
   views::Label* no_cellular_networks_view_;
   SectionHeaderRowView* cellular_header_view_;
   SectionHeaderRowView* tether_header_view_;
   SectionHeaderRowView* wifi_header_view_;
   views::Separator* cellular_separator_view_;
   views::Separator* tether_separator_view_;
   views::Separator* wifi_separator_view_;
+  TriView* connection_warning_;
 
   // An owned list of network info.
   std::vector<std::unique_ptr<NetworkInfo>> network_list_;
 
   using NetworkMap = std::map<views::View*, std::string>;
   NetworkMap network_map_;
 
   // A map of network guids to their view.
   using NetworkGuidMap = std::map<std::string, views::View*>;
   NetworkGuidMap network_guid_map_;
 
   // Save a map of network guids to their infos against current |network_list_|.
   using NetworkInfoMap = std::map<std::string, std::unique_ptr<NetworkInfo>>;
   NetworkInfoMap last_network_info_map_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkListView);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_NETWORK_NETWORK_LIST_H_