wayland: define base:NativeEvent for Wayland

views/widget/tooltip_manager_views.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef VIEWS_WIDGET_TOOLTIP_MANAGER_VIEWS_H_
 #define VIEWS_WIDGET_TOOLTIP_MANAGER_VIEWS_H_
 #pragma once
 
 #include "base/message_loop.h"
 #include "base/timer.h"
 #include "views/controls/label.h"
 #include "views/widget/native_widget.h"
 #include "views/widget/tooltip_manager.h"
 #include "views/widget/widget_delegate.h"
 #include "views/view.h"
 
 #if defined(USE_X11)
 typedef union _XEvent XEvent;
-namespace ui {
-union WaylandEvent;
-}
 #endif
 
 namespace views {
 
 class MouseEvent;
 class Widget;
 
 // TooltipManager implementation for Views.
 class TooltipManagerViews : public TooltipManager {
  public:
@@ skipping 42 matching lines @@
 
   gfx::Point curr_mouse_pos_;
   base::RepeatingTimer<TooltipManagerViews> tooltip_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(TooltipManagerViews);
 };
 
 }  // namespace views
 
 #endif // VIEWS_WIDGET_TOOLTIP_MANAGER_VIEWS_H_