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

ui/ozone/platform/drm/common/native_pixmap_manager_gbm.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 UI_OZONE_PLATFORM_DRM_COMMON_NATIVE_PIXMAP_MANAGER_GBM_H_
 #define UI_OZONE_PLATFORM_DRM_COMMON_NATIVE_PIXMAP_MANAGER_GBM_H_
 
 #include "base/files/scoped_file.h"
 #include "ui/ozone/public/native_pixmap_manager.h"
 
 namespace ui {
 
 // Constructor hook for use in constructor_list.cc
 NativePixmapManager* CreateNativePixmapManagerGbm();
 
 class NativePixmapManagerGbm : public NativePixmapManager {
  public:
   NativePixmapManagerGbm();
   ~NativePixmapManagerGbm() override;
 
   // NativePixmapManager:
   void Initialize(const base::FileDescriptor& device_fd) override;
   std::vector<Configuration> GetSupportedNativePixmapConfigurations()
       const override;
+  scoped_refptr<NativePixmap> CreateFromFileDescriptor(
+      base::FileDescriptor handle,
+      gfx::Size size,
+      SurfaceFactoryOzone::BufferFormat format,
+      SurfaceFactoryOzone::BufferUsage usage) override;
 
  private:
   base::ScopedFD vgem_fd_;
 
   DISALLOW_COPY_AND_ASSIGN(NativePixmapManagerGbm);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_COMMON_NATIVE_PIXMAP_MANAGER_GBM_H_