ash: Display system background while loading wallpaper.

ash/desktop_background/desktop_background_controller.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/desktop_background/desktop_background_controller.h"
 
 #include "ash/desktop_background/desktop_background_view.h"
 #include "ash/desktop_background/desktop_background_widget_controller.h"
+#include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/shell_factory.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/root_window_layout_manager.h"
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/synchronization/cancellation_flag.h"
 #include "base/threading/worker_pool.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
@@ skipping 251 matching lines @@
   current_wallpaper_.reset(wo->ReleaseWallpaperData());
 
   SetDesktopBackgroundImageMode();
 
   DCHECK(wo.get() == wallpaper_op_.get());
   wallpaper_op_ = NULL;
 }
 
 void DesktopBackgroundController::NotifyAnimationFinished() {
   Shell* shell = Shell::GetInstance();
+  shell->GetPrimaryRootWindowController()->HandleDesktopBackgroundVisible();
   shell->user_wallpaper_delegate()->OnWallpaperAnimationFinished();
 }
 
 ui::Layer* DesktopBackgroundController::SetColorLayerForContainer(
     SkColor color,
     aura::RootWindow* root_window,
     int container_id) {
   ui::Layer* background_layer = new ui::Layer(ui::LAYER_SOLID_COLOR);
   background_layer->SetColor(color);
 
@@ skipping 70 matching lines @@
   }
   return moved;
 }
 
 int DesktopBackgroundController::GetBackgroundContainerId(bool locked) {
   return locked ? internal::kShellWindowId_LockScreenBackgroundContainer :
                   internal::kShellWindowId_DesktopBackgroundContainer;
 }
 
 }  // namespace ash