Tray elements behave appropriately on the multiple signin screen (more like lock screen)

chrome/browser/ui/ash/system_tray_delegate_chromeos.cc

 // Copyright 2013 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 "chrome/browser/ui/ash/system_tray_delegate_chromeos.h"
 
 #include <algorithm>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 202 matching lines @@
 void BluetoothSetDiscoveringError() {
   LOG(ERROR) << "BluetoothSetDiscovering failed.";
 }
 
 void BluetoothDeviceConnectError(
     device::BluetoothDevice::ConnectErrorCode error_code) {
   // TODO(sad): Do something?
 }
 
 void ShowSettingsSubPageForActiveUser(const std::string& sub_page) {
+  ash::Shell::GetInstance()
+      ->session_state_delegate()
+      ->HideMultipleSigninScreen();
+
   chrome::ShowSettingsSubPageForProfile(
       ProfileManager::GetActiveUserProfile(), sub_page);
 }
 
 void ShowNetworkSettingsPage(const std::string& service_path) {
   std::string page = chrome::kInternetOptionsSubPage;
   page += "?servicePath=" + net::EscapeUrlEncodedData(service_path, true);
   content::RecordAction(base::UserMetricsAction("OpenInternetOptionsDialog"));
   ShowSettingsSubPageForActiveUser(page);
 }
@@ skipping 603 matching lines @@
                                 SimDialogDelegate::SIM_DIALOG_UNLOCK);
 }
 
 void SystemTrayDelegateChromeOS::ShowMobileSetupDialog(
     const std::string& service_path) {
   MobileSetupDialog::Show(service_path);
 }
 
 void SystemTrayDelegateChromeOS::ShowOtherNetworkDialog(
     const std::string& type) {
+  ash::Shell::GetInstance()
+      ->session_state_delegate()
+      ->HideMultipleSigninScreen();
+
   if (type == shill::kTypeCellular) {
     ChooseMobileNetworkDialog::ShowDialog(GetNativeWindow());
     return;
   }
   NetworkConfigView::ShowForType(type, GetNativeWindow());
 }
 
 bool SystemTrayDelegateChromeOS::GetBluetoothAvailable() {
   return bluetooth_adapter_->IsPresent();
 }
@@ skipping 547 matching lines @@
     accessibility_subscription_.reset();
   else
     OnAccessibilityModeChanged(details.notify);
 }
 
 ash::SystemTrayDelegate* CreateSystemTrayDelegate() {
   return new SystemTrayDelegateChromeOS();
 }
 
 }  // namespace chromeos