ui: Cleanup class/struct forward declarations

ui/platform_window/x11/x11_cursor_ozone.h

 // Copyright 2016 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 UI_PLATFORM_WINDOW_X11_X11_CURSOR_OZONE_H_
 #define UI_PLATFORM_WINDOW_X11_X11_CURSOR_OZONE_H_
 
 #include <X11/X.h>
 
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/platform_window/x11/x11_window_export.h"
 
 class SkBitmap;
 
+namespace gfx {
+class Point;
+}
+
 namespace ui {
 
 // Ref counted class to hold an X11 cursor resource. Handles creating X11 cursor
 // resources from SkBitmap/hotspot and clears the X11 resources on destruction.
 class X11_WINDOW_EXPORT X11CursorOzone
     : public base::RefCounted<X11CursorOzone> {
  public:
   X11CursorOzone(const SkBitmap& bitmap, const gfx::Point& hotspot);
   X11CursorOzone(const std::vector<SkBitmap>& bitmaps,
                  const gfx::Point& hotspot,
@@ skipping 10 matching lines @@
   X11CursorOzone();
   ~X11CursorOzone();
 
   ::Cursor xcursor_ = None;
 
   DISALLOW_COPY_AND_ASSIGN(X11CursorOzone);
 };
 
 }  // namespace ui
 #endif  // UI_PLATFORM_WINDOW_X11_X11_CURSOR_OZONE_H_