mus: Use TooltipManagerAura in NativeWidgetMus.

ui/views/mus/native_widget_mus.h

Index: ui/views/mus/native_widget_mus.h
diff --git a/ui/views/mus/native_widget_mus.h b/ui/views/mus/native_widget_mus.h
index 19a4df75019770cfca50462d951a2d8891e71544..c9809bb425a38a0dbe96966a0281c513300cd144 100644
--- a/ui/views/mus/native_widget_mus.h
+++ b/ui/views/mus/native_widget_mus.h
@@ -54,8 +54,12 @@ class FocusController;
 }
 
 namespace views {
+namespace corewm {
+class TooltipController;
+}
 class DropHelper;
 class DropTargetMus;
+class TooltipManagerAura;
 class WidgetDelegate;
 
 // An implementation of NativeWidget that binds to a ui::Window. Because Aura
@@ -279,11 +283,6 @@ class VIEWS_MUS_EXPORT NativeWidgetMus
   // a separate class.
   std::unique_ptr<MusWindowObserver> mus_window_observer_;
 
-  // This is misnamed; The native widget interface offers something called
-  // "native window properties" which are properties which it stores locally,
-  // and this is used to unsafely pass void* pointers around chrome.
-  std::map<std::string, void*> native_window_properties_;
-
   // Receives drop events for |window_|.
   std::unique_ptr<DropTargetMus> drop_target_;
 
@@ -300,6 +299,9 @@ class VIEWS_MUS_EXPORT NativeWidgetMus
   std::unique_ptr<DropHelper> drop_helper_;
   int last_drop_operation_;
 
+  std::unique_ptr<corewm::TooltipController> tooltip_controller_;
+  std::unique_ptr<TooltipManagerAura> tooltip_manager_;
+
   base::WeakPtrFactory<NativeWidgetMus> close_widget_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWidgetMus);