Moves a couple of the maximize mode classes to ash/common

ash/wm/maximize_mode/maximize_mode_window_manager.h

Index: ash/wm/maximize_mode/maximize_mode_window_manager.h
diff --git a/ash/wm/maximize_mode/maximize_mode_window_manager.h b/ash/wm/maximize_mode/maximize_mode_window_manager.h
index 0ba407bc1d21197cbd38fc8eeabf35c81d3f0d8a..67de5b5095b7d289ee2a2ee6bae164a19295f0aa 100644
--- a/ash/wm/maximize_mode/maximize_mode_window_manager.h
+++ b/ash/wm/maximize_mode/maximize_mode_window_manager.h
@@ -26,6 +26,7 @@ class TouchEvent;
 namespace ash {
 class MaximizeModeController;
 class MaximizeModeWindowState;
+class WmWindow;
 
 // A window manager which - when created - will force all windows into maximized
 // mode. Exception are panels and windows which cannot be maximized.
@@ -51,7 +52,7 @@ class ASH_EXPORT MaximizeModeWindowManager : public aura::WindowObserver,
   void AddWindow(aura::Window* window);
 
   // Called from a window state object when it gets destroyed.
-  void WindowStateDestroyed(aura::Window* window);
+  void WindowStateDestroyed(WmWindow* wm_window);
 
   // ShellObserver overrides:
   void OnOverviewModeStarting() override;