Fix OOBE WebUI being never started.

chrome/browser/chromeos/login/webui_login_display_host.cc

Index: chrome/browser/chromeos/login/webui_login_display_host.cc
diff --git a/chrome/browser/chromeos/login/webui_login_display_host.cc b/chrome/browser/chromeos/login/webui_login_display_host.cc
index 64e45886e7e0147631c011c4989635d03eee9631..6930d97678e9682d87daee2f99528346e2ac9fe4 100644
--- a/chrome/browser/chromeos/login/webui_login_display_host.cc
+++ b/chrome/browser/chromeos/login/webui_login_display_host.cc
@@ -208,14 +208,14 @@ void WebUILoginDisplayHost::Observe(
     ash::Shell::GetInstance()->user_wallpaper_delegate()->
         OnWallpaperBootAnimationFinished();
     if (waiting_for_wallpaper_load_) {
-      if (initialize_webui_in_parallel_)
-        ShowWebUI();
-      else
-        StartPostponedWebUI();
       // StartWizard / StartSignInScreen could be called multiple times through
       // the lifetime of host.
       // Make sure that subsequent calls are not postponed.
       waiting_for_wallpaper_load_ = false;
+      if (initialize_webui_in_parallel_)
+        ShowWebUI();
+      else
+        StartPostponedWebUI();
     }
     registrar_.Remove(this,
                       chrome::NOTIFICATION_WALLPAPER_ANIMATION_FINISHED,
@@ -321,7 +321,7 @@ void WebUILoginDisplayHost::ShowWebUI() {
 }
 
 void WebUILoginDisplayHost::StartPostponedWebUI() {
-  if (!waiting_for_wallpaper_load_ || !is_wallpaper_loaded_) {
+  if (!is_wallpaper_loaded_) {
     NOTREACHED();
     return;
   }