Create a NetworkConnect class and Delegate

ash/system/tray/default_system_tray_delegate.cc

Index: ash/system/tray/default_system_tray_delegate.cc
diff --git a/ash/system/tray/default_system_tray_delegate.cc b/ash/system/tray/default_system_tray_delegate.cc
index 2658f52bd7d54084fa4381786c104456614da820..bd4bb374a9b54d92a244b2cd21af6ce071db6bed 100644
--- a/ash/system/tray/default_system_tray_delegate.cc
+++ b/ash/system/tray/default_system_tray_delegate.cc
@@ -211,14 +211,6 @@ void DefaultSystemTrayDelegate::SwitchIME(const std::string& ime_id) {
 void DefaultSystemTrayDelegate::ActivateIMEProperty(const std::string& key) {
 }
 
-void DefaultSystemTrayDelegate::ShowNetworkConfigure(
-    const std::string& network_id) {
-}
-
-bool DefaultSystemTrayDelegate::EnrollNetwork(const std::string& network_id) {
-  return true;
-}
-
 void DefaultSystemTrayDelegate::ManageBluetoothDevices() {
 }
 
@@ -230,13 +222,6 @@ bool DefaultSystemTrayDelegate::IsBluetoothDiscovering() {
   return false;
 }
 
-void DefaultSystemTrayDelegate::ShowMobileSimDialog() {
-}
-
-void DefaultSystemTrayDelegate::ShowMobileSetupDialog(
-    const std::string& service_path) {
-}
-
 void DefaultSystemTrayDelegate::ShowOtherNetworkDialog(
     const std::string& type) {
 }