[Ozone] Adding a software surface implementation

ui/gfx/ozone/impl/buffer_generator_ozone.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_GFX_OZONE_IMPL_BUFFER_GENERATOR_OZONE_H_
+#define UI_GFX_OZONE_IMPL_BUFFER_GENERATOR_OZONE_H_
+
+#include "base/basictypes.h"
+
+namespace gfx {
+
+class DrmSkBitmapOzone;
+
+// Generates the backing buffers. Using a generator to allow injecting different
+// implementations of the buffer (for example, mocks when testing).
+class BufferGeneratorOzone {
+ public:
+  BufferGeneratorOzone();
+  virtual ~BufferGeneratorOzone();
+
+  // Creates an un-initialized buffer.
+  virtual DrmSkBitmapOzone* CreateBuffer(int fd);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(BufferGeneratorOzone);
+};
+
+}  // namespace gfx
+
+#endif  // UI_GFX_OZONE_IMPL_BUFFER_GENERATOR_OZONE_H_