Converts MaximizeModeWindowManager to use ash/common types

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 9e99b9803d383e16acb94a7766a11df9ce407688..d8234739b98a4b61dadd94144367888266e9b6de 100644
--- a/ash/wm/maximize_mode/maximize_mode_controller.h
+++ b/ash/wm/maximize_mode/maximize_mode_controller.h
@@ -38,6 +38,7 @@ class MaximizeModeControllerTest;
 class ScopedDisableInternalMouseAndKeyboard;
 class MaximizeModeWindowManager;
 class MaximizeModeWindowManagerTest;
+class WmWindow;
 namespace test {
 class MultiUserWindowManagerChromeOSTest;
 class VirtualKeyboardControllerTest;
@@ -76,7 +77,7 @@ 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(aura::Window* window);
+  void AddWindow(WmWindow* window);
 
   // ShellObserver:
   void OnAppTerminating() override;