[mus+ash] Removes WmWindow from ash (app_list, frame, metrics, session, system, wallpaper)

ash/wallpaper/wallpaper_widget_controller.h

Index: ash/wallpaper/wallpaper_widget_controller.h
diff --git a/ash/wallpaper/wallpaper_widget_controller.h b/ash/wallpaper/wallpaper_widget_controller.h
index a1a61a3076150e672e2499e64714772666d903f6..1c379ee9c1b7c94ac7ee1ac483fafed055a323cf 100644
--- a/ash/wallpaper/wallpaper_widget_controller.h
+++ b/ash/wallpaper/wallpaper_widget_controller.h
@@ -15,7 +15,6 @@
 namespace ash {
 
 class RootWindowController;
-class WmWindow;
 
 // This class implements a widget-based wallpaper.
 // WallpaperWidgetController is owned by RootWindowController.
@@ -36,7 +35,7 @@ class ASH_EXPORT WallpaperWidgetController : public views::WidgetObserver,
   // Move the wallpaper for |root_window| to the specified |container|.
   // The lock screen moves the wallpaper container to hides the user's windows.
   // Returns true if there was something to reparent.
-  bool Reparent(WmWindow* root_window, int container);
+  bool Reparent(aura::Window* root_window, int container);
 
   // Starts wallpaper fade in animation. |root_window_controller| is
   // the root window where the animation will happen. (This is
@@ -56,7 +55,7 @@ class ASH_EXPORT WallpaperWidgetController : public views::WidgetObserver,
   views::Widget* widget_;
 
   // Parent of |widget_|.
-  WmWindow* widget_parent_;
+  aura::Window* widget_parent_;
 
   DISALLOW_COPY_AND_ASSIGN(WallpaperWidgetController);
 };