Take GL version and extensions correctly into account when binding functions

ui/gl/gl_version_info.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_GL_GL_VERSION_INFO_H_
+#define UI_GL_GL_VERSION_INFO_H_
+
+#include <string>
+#include "base/basictypes.h"
+
+namespace gfx {
+
+struct GLVersionInfo {
+  explicit GLVersionInfo(const char* version_str);
+
+  // New flags, such as is_gl4_4 could be introduced as needed.
+  // For now, this level of granularity is enough.
+  bool is_es;
+  bool is_es1;
+  bool is_es2;
+  bool is_es3;
+
+  bool is_gl1;
+  bool is_gl2;
+  bool is_gl3;
+  bool is_gl4;
+
+private:
+  DISALLOW_COPY_AND_ASSIGN(GLVersionInfo);
+};
+
+}  // namespace gfx
+
+#endif // UI_GL_GL_VERSION_INFO_H_