exo: Fix CreateLinuxFence test.

components/exo/display.h

 // Copyright 2015 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 COMPONENTS_EXO_DISPLAY_H_
 #define COMPONENTS_EXO_DISPLAY_H_
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/shared_memory_handle.h"
 
+#if defined(OS_LINUX)
+#include "base/files/scoped_file.h"
+#endif
+
 #if defined(USE_OZONE)
-#include "base/files/scoped_file.h"
 #include "ui/gfx/buffer_types.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/native_pixmap_handle.h"
 #endif
 
 namespace gfx {
 class GpuFence;
 class Point;
 }
 
@@ skipping 27 matching lines @@
       const base::SharedMemoryHandle& handle,
       size_t size);
 
 #if defined(USE_OZONE)
   // Creates a buffer for a Linux DMA-buf file descriptor.
   std::unique_ptr<Buffer> CreateLinuxDMABufBuffer(
       const gfx::Size& size,
       gfx::BufferFormat format,
       const std::vector<gfx::NativePixmapPlane>& planes,
       std::vector<base::ScopedFD>&& fds);
+#endif  // defined(USE_OZONE)
 
+#if defined(OS_LINUX)
   // Creates a GpuFence for a Linux fence file descriptor.
   std::unique_ptr<gfx::GpuFence> CreateLinuxFence(base::ScopedFD fd);
-#endif
+#endif  // defined(OS_LINUX)
 
   // Creates a shell surface for an existing surface.
   std::unique_ptr<ShellSurface> CreateShellSurface(Surface* surface);
 
   // Creates a popup shell surface for an existing surface at |position| and
   // with |parent|. |position| is in |parent| surface local coordinates.
   std::unique_ptr<ShellSurface> CreatePopupShellSurface(
       Surface* surface,
       ShellSurface* parent,
       const gfx::Point& position);
@@ skipping 14 matching lines @@
 
  private:
   NotificationSurfaceManager* const notification_surface_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(Display);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_DISPLAY_H_