[cros] Initialize OOBE in parallel when boot animation is disabled.

ash/shell.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/shell.h"
 
 #include <algorithm>
 #include <string>
 
 #include "ash/accelerators/focus_manager_factory.h"
@@ skipping 440 matching lines @@
 
   // StatusAreaWidget uses Shell's CapsLockDelegate.
   if (delegate_.get())
     caps_lock_delegate_.reset(delegate_->CreateCapsLockDelegate());
   else
     caps_lock_delegate_.reset(new CapsLockDelegateStub);
 
   // Initialize Primary RootWindow specific items.
   status_area_widget_ = new internal::StatusAreaWidget();
   status_area_widget_->CreateTrayViews(delegate_.get());
-  status_area_widget_->Show();
+  // Login screen manages status area visibility by itself.
+  if (delegate_.get() && delegate_->IsSessionStarted())
+    status_area_widget_->Show();
 
   focus_cycler_.reset(new internal::FocusCycler());
   focus_cycler_->AddWidget(status_area_widget_);
 
   // This controller needs to be set before SetupManagedWindowMode.
   desktop_background_controller_.reset(new DesktopBackgroundController());
   if (delegate_.get())
     user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
   if (!user_wallpaper_delegate_.get())
     user_wallpaper_delegate_.reset(new DummyUserWallpaperDelegate());
@@ skipping 299 matching lines @@
 }
 
 void Shell::ShowCursor(bool visible) {
   RootWindowList root_windows = GetAllRootWindows();
   for (RootWindowList::iterator iter = root_windows.begin();
        iter != root_windows.end(); ++iter)
     (*iter)->ShowCursor(visible);
 }
 
 }  // namespace ash