ash: Display system background while loading wallpaper.

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 393 matching lines @@
 #endif
 
   system_gesture_filter_.reset(new internal::SystemGestureEventFilter);
   AddEnvEventFilter(system_gesture_filter_.get());
 
   capture_controller_.reset(new internal::CaptureController);
 
   internal::RootWindowController* root_window_controller =
       new internal::RootWindowController(root_window);
   root_window_controller->CreateContainers();
+  root_window_controller->CreateSystemBackground(
+      delegate_.get() ? delegate_->IsFirstRunAfterBoot() : false);
 
   CommandLine* command_line = CommandLine::ForCurrentProcess();
 
   if (command_line->HasSwitch(switches::kAshTouchHud)) {
     touch_observer_hud_.reset(new internal::TouchObserverHUD);
     AddEnvEventFilter(touch_observer_hud_.get());
   }
 
   mouse_cursor_filter_.reset(new internal::MouseCursorEventFilter());
   AddEnvEventFilter(mouse_cursor_filter_.get());
@@ skipping 344 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