Add a battery icon to the right of Tether networks in system tray.

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 55 matching lines @@
   // Returns a set of guids for the added network connections.
   std::unique_ptr<std::set<std::string>> UpdateNetworkListEntries();
 
   // Creates the view which displays a warning message, if a VPN or proxy is
   // being used.
   TriView* CreateConnectionWarning();
 
   // Updates |view| with the information in |info|.
   void UpdateViewForNetwork(HoverHighlightView* view, const NetworkInfo& info);
 
+  // Creates the a battery icon next to the name of Tether networks indicating
+  // the battery percentage of the mobile device that is being used as a
+  // hotspot.
+  views::View* CreatePowerStatusView(const NetworkInfo& info);
+
   // Creates the view of an extra icon appearing next to the network name
   // indicating that the network is controlled by an extension. If no extension
   // is registered for this network, returns |nullptr|.
   views::View* CreateControlledByExtensionView(const NetworkInfo& info);
 
   // Adds or updates child views representing the network connections when
   // |is_wifi| is matching the attribute of a network connection starting at
   // |child_index|. Returns a set of guids for the added network
   // connections.
   std::unique_ptr<std::set<std::string>> UpdateNetworkChildren(
@@ skipping 56 matching lines @@
   using NetworkInfoMap = std::map<std::string, std::unique_ptr<NetworkInfo>>;
   NetworkInfoMap last_network_info_map_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkListView);
 };
 
 }  // namespace tray
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_NETWORK_NETWORK_LIST_H_