[cros] Add network tray item for mobile network setup.

chrome/browser/chromeos/status/network_menu.h

 // Copyright (c) 2012 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 CHROME_BROWSER_CHROMEOS_STATUS_NETWORK_MENU_H_
 #define CHROME_BROWSER_CHROMEOS_STATUS_NETWORK_MENU_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/chromeos/cros/network_library.h"  // ConnectionType
 #include "ui/gfx/native_widget_types.h"  // gfx::NativeWindow
 #include "ui/views/controls/button/menu_button_listener.h"
 
+class Browser;
+
 namespace ui {
 class MenuModel;
 }
 
 namespace views {
 class MenuItemView;
 class MenuButton;
 class MenuModelAdapter;
 class MenuRunner;
 }
@@ skipping 83 matching lines @@
 
   // Shows UI to user to search for cellular networks.
   void ShowOtherCellular();
 
   // Decides whether a network should be highlighted in the UI.
   bool ShouldHighlightNetwork(const Network* network);
 
  private:
   friend class NetworkMenuModel;
 
+  // Returns the last active browser. If there is no such browser, creates a new
+  // browser window with an empty tab and returns it.
+  Browser* GetAppropriateBrowser();
+
   // Weak ptr to delegate.
   Delegate* delegate_;
 
   // Set to true if we are currently refreshing the menu.
   bool refreshing_menu_;
 
   // The network menu.
   scoped_ptr<NetworkMenuModel> main_menu_model_;
   scoped_ptr<views::MenuModelAdapter> menu_model_adapter_;
   views::MenuItemView* menu_item_view_;
   scoped_ptr<views::MenuRunner> menu_runner_;
 
   // Holds minimum width of the menu.
   int min_width_;
 
   // Weak pointer factory so we can start connections at a later time
   // without worrying that they will actually try to happen after the lifetime
   // of this object.
   base::WeakPtrFactory<NetworkMenu> weak_pointer_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkMenu);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_STATUS_NETWORK_MENU_H_