Converts ShellObserver from aura::Window to ash::WmWindow

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/ash_switches.h"
+#include "ash/aura/wm_window_aura.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/wm/root_window_layout_manager.h"
 #include "ash/desktop_background/desktop_background_controller_observer.h"
 #include "ash/desktop_background/desktop_background_view.h"
 #include "ash/desktop_background/desktop_background_widget_controller.h"
 #include "ash/desktop_background/user_wallpaper_delegate.h"
 #include "ash/display/display_info.h"
 #include "ash/display/display_manager.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
@@ skipping 117 matching lines @@
         current_wallpaper_.get()) {
       timer_.Stop();
       timer_.Start(FROM_HERE,
                    base::TimeDelta::FromMilliseconds(wallpaper_reload_delay_),
                    base::Bind(&DesktopBackgroundController::UpdateWallpaper,
                               base::Unretained(this), false /* clear cache */));
     }
   }
 }
 
-void DesktopBackgroundController::OnRootWindowAdded(aura::Window* root_window) {
+void DesktopBackgroundController::OnRootWindowAdded(WmWindow* root_window) {
   // The background hasn't been set yet.
   if (desktop_background_mode_ == BACKGROUND_NONE)
     return;
 
   // Handle resolution change for "built-in" images.
   gfx::Size max_display_size = GetMaxDisplaySizeInNative();
   if (current_max_display_size_ != max_display_size) {
     current_max_display_size_ = max_display_size;
     if (desktop_background_mode_ == BACKGROUND_IMAGE &&
         current_wallpaper_.get())
       UpdateWallpaper(true /* clear cache */);
   }
 
-  InstallDesktopController(root_window);
+  InstallDesktopController(WmWindowAura::GetAuraWindow(root_window));
 }
 
 // static
 gfx::Size DesktopBackgroundController::GetMaxDisplaySizeInNative() {
   // Return an empty size for test environments where the screen is null.
   if (!display::Screen::GetScreen())
     return gfx::Size();
 
   int width = 0;
   int height = 0;
@@ skipping 112 matching lines @@
                 : kShellWindowId_DesktopBackgroundContainer;
 }
 
 void DesktopBackgroundController::UpdateWallpaper(bool clear_cache) {
   current_wallpaper_.reset(NULL);
   ash::Shell::GetInstance()->user_wallpaper_delegate()->UpdateWallpaper(
       clear_cache);
 }
 
 }  // namespace ash