ozone: Implement zero/one-copy texture for Ozone GBM.

ui/ozone/public/surface_factory_ozone.cc

 // Copyright (c) 2013 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.
 
 #include "ui/ozone/public/surface_factory_ozone.h"
 
 #include <stdlib.h>
 
 #include "base/command_line.h"
 #include "ui/ozone/public/native_pixmap.h"
@@ skipping 37 matching lines @@
 }
 
 scoped_refptr<ui::NativePixmap> SurfaceFactoryOzone::CreateNativePixmap(
     gfx::AcceleratedWidget widget,
     gfx::Size size,
     BufferFormat format,
     BufferUsage usage) {
   return NULL;
 }
 
+base::FileDescriptor SurfaceFactoryOzone::ExportDmaBuf(
+    gfx::AcceleratedWidget widget,
+    scoped_refptr<NativePixmap> pixmap) {
+  return base::FileDescriptor();
+}
+
 bool SurfaceFactoryOzone::CanShowPrimaryPlaneAsOverlay() {
   return false;
 }
 
 }  // namespace ui