Change NativeBufferOzone to be an object and move the overlay calls to the surface object.

ui/ozone/public/native_pixmap.h

+// 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.
+
+#ifndef UI_OZONE_PUBLIC_NATIVE_PIXMAP_H_
+#define UI_OZONE_PUBLIC_NATIVE_PIXMAP_H_
+
+#include "base/memory/ref_counted.h"
+
+namespace ui {
+
+// This represents a buffer that can be directly imported via GL for
+// rendering, or exported via dma-buf fds.
+class NativePixmap : public base::RefCounted<NativePixmap> {
+ public:
+  NativePixmap() {}
+
+  virtual void* /* EGLClientBuffer */ GetEGLClientBuffer() = 0;
+  virtual int GetDmaBufFd() = 0;
+
+ protected:
+  virtual ~NativePixmap() {}
+
+  friend class base::RefCounted<NativePixmap>;
+
+  DISALLOW_COPY_AND_ASSIGN(NativePixmap);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PUBLIC_NATIVE_PIXMAP_H_