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

ui/ozone/public/native_pixmap_manager.h

Index: ui/ozone/public/native_pixmap_manager.h
diff --git a/ui/ozone/public/native_pixmap_manager.h b/ui/ozone/public/native_pixmap_manager.h
index 7ba37b6f983f97448dfb4ae3ec6dc2df9fc59661..06984d0e17c629d60f0fab0e1e72ab0ae6dd664f 100644
--- a/ui/ozone/public/native_pixmap_manager.h
+++ b/ui/ozone/public/native_pixmap_manager.h
@@ -6,6 +6,7 @@
 #define UI_OZONE_PUBLIC_NATIVE_PIXMAP_MANAGER_H_
 
 #include "ui/ozone/ozone_export.h"
+#include "ui/ozone/public/native_pixmap.h"
 #include "ui/ozone/public/surface_factory_ozone.h"
 
 namespace base {
@@ -35,6 +36,14 @@ class OZONE_EXPORT NativePixmapManager {
   virtual std::vector<Configuration> GetSupportedNativePixmapConfigurations()
       const = 0;
 
+  // Create a single native buffer from |handle| to be used for zero copy in
+  // Browser or Render process.
+  virtual scoped_refptr<NativePixmap> CreateFromFileDescriptor(
+      base::FileDescriptor handle,
+      gfx::Size size,
+      SurfaceFactoryOzone::BufferFormat format,
+      SurfaceFactoryOzone::BufferUsage usage) = 0;
+
  protected:
   NativePixmapManager();