Remove dependency on ui from view_manager.

mojo/services/window_manager/window_manager_app.h

Index: mojo/services/window_manager/window_manager_app.h
diff --git a/mojo/services/window_manager/window_manager_app.h b/mojo/services/window_manager/window_manager_app.h
index 503c0068152c157e00cd0e20d76b7f5f19cb82f9..e2033a5d9dbbd32faba863cade89936ec375e069 100644
--- a/mojo/services/window_manager/window_manager_app.h
+++ b/mojo/services/window_manager/window_manager_app.h
@@ -119,8 +119,8 @@ class WindowManagerApp
   void OnTreeChanged(const ViewObserver::TreeChangeParams& params) override;
   void OnViewDestroying(View* view) override;
   void OnViewBoundsChanged(View* view,
-                           const gfx::Rect& old_bounds,
-                           const gfx::Rect& new_bounds) override;
+                           const Rect& old_bounds,
+                           const Rect& new_bounds) override;
 
   // Overridden from ui::EventHandler:
   void OnEvent(ui::Event* event) override;