Replace network combobox with network dropdown button

chrome/browser/chromeos/status/network_dropdown_button.h

Index: chrome/browser/chromeos/status/network_dropdown_button.h
diff --git a/chrome/browser/chromeos/status/network_dropdown_button.h b/chrome/browser/chromeos/status/network_dropdown_button.h
new file mode 100644
index 0000000000000000000000000000000000000000..4be58d4fba566c24fb87d13871e313ab02dd05f4
--- /dev/null
+++ b/chrome/browser/chromeos/status/network_dropdown_button.h
@@ -0,0 +1,46 @@
+// Copyright (c) 2010 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_DROPDOWN_BUTTON_H_
+#define CHROME_BROWSER_CHROMEOS_STATUS_NETWORK_DROPDOWN_BUTTON_H_
+#pragma once
+
+#include "chrome/browser/chromeos/cros/network_library.h"
+#include "chrome/browser/chromeos/status/network_menu.h"
+#include "views/controls/button/menu_button.h"
+
+namespace chromeos {
+
+// The network dropdown button with menu. Used on welcome screen.
+// This class will handle getting the networks to show connected network
+// at top level and populating the menu.
+// See NetworkMenu for more details.
+class NetworkDropdownButton : public views::MenuButton,
+                              public NetworkMenu,
+                              public NetworkLibrary::Observer {
+ public:
+  NetworkDropdownButton(bool browser_mode, gfx::NativeWindow parent_window);
+  virtual ~NetworkDropdownButton();
+
+  // NetworkLibrary::Observer implementation.
+  virtual void NetworkChanged(NetworkLibrary* obj);
+
+ protected:
+  // NetworkMenu implementation:
+  virtual bool IsBrowserMode() const { return browser_mode_; }
+  virtual gfx::NativeWindow GetNativeWindow() const { return parent_window_; }
+  virtual void OpenButtonOptions() const {}
+  virtual bool ShouldOpenButtonOptions() const {return false; }
+
+ private:
+  bool browser_mode_;
+
+  gfx::NativeWindow parent_window_;
+
+  DISALLOW_COPY_AND_ASSIGN(NetworkDropdownButton);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_STATUS_NETWORK_DROPDOWN_BUTTON_H_