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

ui/ozone/platform/drm/gpu/gbm_surface_factory.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_DRM_GPU_GBM_SURFACE_FACTORY_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_GBM_SURFACE_FACTORY_H_
 
 #include "ui/ozone/platform/drm/gpu/drm_surface_factory.h"
 
 namespace ui {
@@ skipping 21 matching lines @@
       gfx::AcceleratedWidget widget) override;
   scoped_ptr<ui::SurfaceOzoneEGL> CreateEGLSurfaceForWidget(
       gfx::AcceleratedWidget w) override;
   scoped_ptr<SurfaceOzoneEGL> CreateSurfacelessEGLSurfaceForWidget(
       gfx::AcceleratedWidget widget) override;
   scoped_refptr<ui::NativePixmap> CreateNativePixmap(
       gfx::AcceleratedWidget widget,
       gfx::Size size,
       BufferFormat format,
       BufferUsage usage) override;
+  base::FileDescriptor ExportDmaBuf(
+      gfx::AcceleratedWidget widget,
+      scoped_refptr<NativePixmap> pixmap) override;
   bool CanShowPrimaryPlaneAsOverlay() override;
 
  private:
   scoped_refptr<GbmDevice> GetGbmDevice(gfx::AcceleratedWidget widget);
 
   bool allow_surfaceless_;
 
   DrmDeviceManager* drm_device_manager_;  // Not owned.
 
   DISALLOW_COPY_AND_ASSIGN(GbmSurfaceFactory);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_GBM_SURFACE_FACTORY_H_