[mus+ash] Removes WmWindow from ash/wm/window_cycle_*

ash/wm/window_mirror_view.h

Index: ash/wm/window_mirror_view.h
diff --git a/ash/wm/window_mirror_view.h b/ash/wm/window_mirror_view.h
index b1b645976b11afca2e4515cb619a51194ae245d3..80d0820d9757ca1b03748da7b9d4a4e56b63e56e 100644
--- a/ash/wm/window_mirror_view.h
+++ b/ash/wm/window_mirror_view.h
@@ -11,20 +11,22 @@
 #include "base/macros.h"
 #include "ui/views/view.h"
 
+namespace aura {
+class Window;
+}
+
 namespace ui {
 class LayerTreeOwner;
 }
 
 namespace ash {
 
-class WmWindow;
-
 namespace wm {
 
 // A view that mirrors the client area of a single window.
 class WindowMirrorView : public views::View {
  public:
-  explicit WindowMirrorView(WmWindow* window);
+  explicit WindowMirrorView(aura::Window* window);
   ~WindowMirrorView() override;
 
   // views::View:
@@ -45,7 +47,7 @@ class WindowMirrorView : public views::View {
   gfx::Rect GetClientAreaBounds() const;
 
   // The original window that is being represented by |this|.
-  WmWindow* target_;
+  aura::Window* target_;
 
   // Retains ownership of the mirror layer tree. This is lazily initialized
   // the first time the view becomes visible.