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

ui/ozone/platform/dri/dri_wrapper.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_DRI_WRAPPER_H_
 #define UI_OZONE_PLATFORM_DRI_DRI_WRAPPER_H_
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/rect_f.h"
 #include "ui/gfx/overlay_transform.h"
+#include "ui/ozone/ozone_export.h"
 #include "ui/ozone/platform/dri/hardware_display_plane_manager.h"
 #include "ui/ozone/platform/dri/scoped_drm_types.h"
 
 typedef struct _drmEventContext drmEventContext;
 typedef struct _drmModeModeInfo drmModeModeInfo;
 
 struct SkImageInfo;
 
 namespace base {
 class SingleThreadTaskRunner;
 }  // namespace base
 
 namespace ui {
 
 class HardwareDisplayPlaneManager;
 
 // Wraps DRM calls into a nice interface. Used to provide different
 // implementations of the DRM calls. For the actual implementation the DRM API
 // would be called. In unit tests this interface would be stubbed.
-class DriWrapper {
+class OZONE_EXPORT DriWrapper {
  public:
   typedef base::Callback<void(unsigned int /* frame */,
                               unsigned int /* seconds */,
                               unsigned int /* useconds */)> PageFlipCallback;
 
   DriWrapper(const char* device_path);
   virtual ~DriWrapper();
 
   // Open device.
   virtual void Initialize();
@@ skipping 129 matching lines @@
 
   // Watcher for |fd_| listening for page flip events.
   scoped_refptr<IOWatcher> watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(DriWrapper);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRI_DRI_WRAPPER_H_