Remove ash tray utility functions that are no-ops in MD.

ash/common/system/chromeos/network/tray_network.cc

 // 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.
 
 #include "ash/common/system/chromeos/network/tray_network.h"
 
 #include "ash/common/shelf/wm_shelf_util.h"
 #include "ash/common/system/chromeos/network/network_icon.h"
 #include "ash/common/system/chromeos/network/network_icon_animation.h"
 #include "ash/common/system/chromeos/network/network_icon_animation_observer.h"
@@ skipping 285 matching lines @@
 }
 
 void TrayNetwork::DestroyDefaultView() {
   default_ = NULL;
 }
 
 void TrayNetwork::DestroyDetailedView() {
   detailed_ = NULL;
 }
 
-void TrayNetwork::UpdateAfterLoginStatusChange(LoginStatus status) {}
-
-void TrayNetwork::UpdateAfterShelfAlignmentChange(ShelfAlignment alignment) {
-  if (tray_)
-    SetTrayImageItemBorder(tray_, alignment);
-}
-
 void TrayNetwork::RequestToggleWifi() {
   // This will always be triggered by a user action (e.g. keyboard shortcut)
   if (!detailed_ ||
       detailed_->GetViewType() == tray::NetworkDetailedView::WIFI_VIEW) {
     request_wifi_view_ = true;
     PopupDetailedView(kTrayPopupAutoCloseDelayForTextInSeconds, false);
   }
   NetworkStateHandler* handler = NetworkHandler::Get()->network_state_handler();
   bool enabled = handler->IsTechnologyEnabled(NetworkTypePattern::WiFi());
   WmShell::Get()->RecordUserMetricsAction(
       enabled ? UMA_STATUS_AREA_DISABLE_WIFI : UMA_STATUS_AREA_ENABLE_WIFI);
   handler->SetTechnologyEnabled(NetworkTypePattern::WiFi(), !enabled,
                                 chromeos::network_handler::ErrorCallback());
 }
 
 void TrayNetwork::OnCaptivePortalDetected(const std::string& /* guid */) {
   NetworkStateChanged();
 }
 
 void TrayNetwork::NetworkStateChanged() {
   if (tray_)
     tray_->UpdateNetworkStateHandlerIcon();
   if (default_)
     default_->Update();
   if (detailed_)
     detailed_->Update();
 }
 
 }  // namespace ash