ash: Display system background while loading wallpaper.

ash/desktop_background/desktop_background_view.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_view.h"
 
 #include <limits>
 
 #include "ash/ash_export.h"
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/desktop_background/desktop_background_widget_controller.h"
+#include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/window_animations.h"
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
 #include "ui/aura/root_window.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_animation_observer.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
@@ skipping 18 matching lines @@
 
   virtual ~ShowWallpaperAnimationObserver() {
     if (desktop_widget_)
       desktop_widget_->GetNativeView()->RemoveObserver(this);
   }
 
  private:
   // Overridden from ui::ImplicitAnimationObserver:
   virtual void OnImplicitAnimationsCompleted() OVERRIDE {
     ash::Shell* shell = ash::Shell::GetInstance();
+    shell->GetPrimaryRootWindowController()->HandleDesktopBackgroundVisible();
     shell->user_wallpaper_delegate()->OnWallpaperAnimationFinished();
     // Only removes old component when wallpaper animation finished. If we
     // remove the old one too early, there will be a white flash during
     // animation.
     if (root_window_->GetProperty(kComponentWrapper)) {
       internal::DesktopBackgroundWidgetController* component =
           root_window_->GetProperty(kComponentWrapper)->GetComponent(true);
       root_window_->SetProperty(kWindowDesktopComponent, component);
     }
     desktop_widget_->GetNativeView()->RemoveObserver(this);
@@ skipping 124 matching lines @@
   settings.SetPreemptionStrategy(ui::LayerAnimator::ENQUEUE_NEW_ANIMATION);
   settings.AddObserver(new ShowWallpaperAnimationObserver(root_window,
                                                           desktop_widget));
   desktop_widget->Show();
   desktop_widget->GetNativeView()->SetName("DesktopBackgroundView");
   return desktop_widget;
 }
 
 }  // namespace internal
 }  // namespace ash