[mus+ash] Removes WmWindow from ash/wm/mru_window_tracker and overview mode

ash/wm/maximize_mode/maximize_mode_controller.h

Index: ash/wm/maximize_mode/maximize_mode_controller.h
diff --git a/ash/wm/maximize_mode/maximize_mode_controller.h b/ash/wm/maximize_mode/maximize_mode_controller.h
index 2c22b3087c5f71353dc3ac44fd1a929c32c0721a..7ce9549c2787fcc9b8336c7ef50f0fb94ff5f339 100644
--- a/ash/wm/maximize_mode/maximize_mode_controller.h
+++ b/ash/wm/maximize_mode/maximize_mode_controller.h
@@ -23,6 +23,10 @@
 #include "mojo/public/cpp/bindings/interface_ptr_set.h"
 #include "ui/gfx/geometry/vector3d_f.h"
 
+namespace aura {
+class Window;
+}
+
 namespace base {
 class TickClock;
 }
@@ -37,7 +41,7 @@ class MaximizeModeControllerTest;
 class ScopedDisableInternalMouseAndKeyboard;
 class MaximizeModeWindowManager;
 class MaximizeModeWindowManagerTest;
-class WmWindow;
+
 namespace test {
 class MultiUserWindowManagerChromeOSTest;
 class VirtualKeyboardControllerTest;
@@ -84,7 +88,7 @@ class ASH_EXPORT MaximizeModeController
   // only required for special windows which are handled by other window
   // managers like the |MultiUserWindowManager|.
   // If the maximize mode is not enabled no action will be performed.
-  void AddWindow(WmWindow* window);
+  void AddWindow(aura::Window* window);
 
   // Binds the mojom::TouchViewManager interface request to this object.
   void BindRequest(mojom::TouchViewManagerRequest request);