Add OzoneGLImpl interface.

ui/gl/init/ozone_util.h

+// Copyright 2016 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_GL_INIT_OZONE_UTIL_H_
+#define UI_GL_INIT_OZONE_UTIL_H_
+
+#include "base/macros.h"
+#include "ui/gl/gl_implementation.h"
+#include "ui/ozone/public/gl_ozone.h"
+#include "ui/ozone/public/surface_factory_ozone.h"
+
+namespace gl {

[rjkroege, 2016/08/26 19:55:53]

Can you remind me of the layering? I think it should go like this?

ui/gl -> ui/ozone -> gl

yes?

[kylechar, 2016/08/29 15:38:14]

Yep, that's exactly it.

+
+ui::SurfaceFactoryOzone* GetSurfaceFactory();
+
+// Returns true if there is an GLOzone for the specified GL implementation.
+bool HasGLOzone(GLImplementation impl);
+
+// Returns true if there is an GLOzone for the set GL implementation.
+bool HasGLOzone();
+
+// Returns the GLOzone for the specified GL implementation or null if none
+// exists.
+ui::GLOzone* GetGLOzone(GLImplementation impl);
+
+// Returns the GLOzone for the set GL implementation or null if none exists.
+ui::GLOzone* GetGLOzone();
+
+}  // namespace gl
+
+#endif  // UI_GL_INIT_OZONE_UTIL_H_