Replace network combobox with network dropdown button

chrome/browser/chromeos/login/network_selection_view.h

Index: chrome/browser/chromeos/login/network_selection_view.h
diff --git a/chrome/browser/chromeos/login/network_selection_view.h b/chrome/browser/chromeos/login/network_selection_view.h
index e7c8a74ca053a37798fec642626e483ea2fc5093..7a35e247e98bd4a31fc4f513b1764c20331846b0 100644
--- a/chrome/browser/chromeos/login/network_selection_view.h
+++ b/chrome/browser/chromeos/login/network_selection_view.h
@@ -21,6 +21,7 @@ class SmoothedThrobber;
 
 namespace chromeos {
 
+class NetworkDropdownButton;
 class NetworkScreenDelegate;
 class ScreenObserver;
 
@@ -40,15 +41,8 @@ class NetworkSelectionView : public views::View {
   virtual gfx::Size GetPreferredSize();
   virtual void Layout();
 
-  // Gets/Sets the selected item in the network combobox.
-  int GetSelectedNetworkItem() const;
-  void SetSelectedNetworkItem(int index);
-
   gfx::NativeWindow GetNativeWindow();
 
-  // Inform the network combobox that its model changed.
-  void NetworkModelChanged();
-
   // Shows network connecting status or network selection otherwise.
   void ShowConnectingStatus(bool connecting, const string16& network_id);
 
@@ -69,7 +63,6 @@ class NetworkSelectionView : public views::View {
   void UpdateConnectingNetworkLabel();
 
   // Dialog controls.
-  views::Combobox* network_combobox_;
   views::MenuButton* languages_menubutton_;
   views::Label* welcome_label_;
   views::Label* select_language_label_;
@@ -81,6 +74,8 @@ class NetworkSelectionView : public views::View {
   // Tab index of continue button.
   int continue_button_order_index_;
 
+  NetworkDropdownButton* network_dropdown_;
+
   // NetworkScreen delegate.
   NetworkScreenDelegate* delegate_;