More Aura fixes to build with chromeos==1

chrome/browser/chromeos/login/base_login_display_host.cc

Index: chrome/browser/chromeos/login/base_login_display_host.cc
diff --git a/chrome/browser/chromeos/login/base_login_display_host.cc b/chrome/browser/chromeos/login/base_login_display_host.cc
index 6fbec925e8fc610a0b3cce75bb367bf3e1017380..8d8a5c603e22eee409f25ab871f50f1dce3a773e 100644
--- a/chrome/browser/chromeos/login/base_login_display_host.cc
+++ b/chrome/browser/chromeos/login/base_login_display_host.cc
@@ -263,11 +263,16 @@ void ShowLoginWizard(const std::string& first_screen_name,
       first_screen_name == chromeos::WizardController::kLoginScreenName;
 
   chromeos::LoginDisplayHost* display_host;
+#if defined(USE_AURA)
+  // Under Aura we always use the WebUI.
+  display_host = new chromeos::WebUILoginDisplayHost(screen_bounds);
+#else
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kWebUILogin)) {
     display_host = new chromeos::WebUILoginDisplayHost(screen_bounds);
   } else {
     display_host = new chromeos::ViewsLoginDisplayHost(screen_bounds);
   }
+#endif
 
   if (show_login_screen && chromeos::CrosLibrary::Get()->EnsureLoaded()) {
     // R11 > R12 migration fix. See http://crosbug.com/p/4898.