Added a message that suggest to configure a proxy for a network.

chrome/browser/ui/webui/chromeos/login/network_dropdown_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/network_dropdown_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/network_dropdown_handler.cc b/chrome/browser/ui/webui/chromeos/login/network_dropdown_handler.cc
index 67973f1779e5a4b5647f33aaac94b1643a9ed792..52c800a7cd7bbe9ca55a26af6ff45beb109c889e 100644
--- a/chrome/browser/ui/webui/chromeos/login/network_dropdown_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/network_dropdown_handler.cc
@@ -36,6 +36,8 @@ void NetworkDropdownHandler::GetLocalizedStrings(
     base::DictionaryValue* localized_strings) {
   localized_strings->SetString("selectNetwork",
       l10n_util::GetStringUTF16(IDS_NETWORK_SELECTION_SELECT));
+  localized_strings->SetString("selectAnotherNetwork",
+      l10n_util::GetStringUTF16(IDS_ANOTHER_NETWORK_SELECTION_SELECT));
 }
 
 void NetworkDropdownHandler::Initialize() {