ozone: dri: Fix undefined references in DRI platform GN build

ui/ozone/platform/dri/overlay_plane.h

 // Copyright 2014 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_OZONE_PLATFORM_DRI_OVERLAY_PLANE_H_
 #define UI_OZONE_PLATFORM_DRI_OVERLAY_PLANE_H_
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/overlay_transform.h"
+#include "ui/ozone/ozone_export.h"
 
 namespace ui {
 
 class ScanoutBuffer;
 
 struct OverlayPlane;
 typedef std::vector<OverlayPlane> OverlayPlaneList;
 
-struct OverlayPlane {
+struct OZONE_EXPORT OverlayPlane {
   // Simpler constructor for the primary plane.
   explicit OverlayPlane(scoped_refptr<ScanoutBuffer> buffer);
 
   OverlayPlane(scoped_refptr<ScanoutBuffer> buffer,
                int z_order,
                gfx::OverlayTransform plane_transform,
                const gfx::Rect& display_bounds,
                const gfx::RectF& crop_rect);
 
   ~OverlayPlane();
 
   // Returns the primary plane in |overlays|.
   static const OverlayPlane* GetPrimaryPlane(const OverlayPlaneList& overlays);
 
   scoped_refptr<ScanoutBuffer> buffer;
   int z_order;
   gfx::OverlayTransform plane_transform;
   gfx::Rect display_bounds;
   gfx::RectF crop_rect;
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRI_OVERLAY_PLANE_H_