Emulate GL_PRIMITIVE_RESTART_FIXED_INDEX: part I

ui/gl/gl_version_info.h

 // Copyright 2014 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 <set>
 #include <string>
 #include "base/basictypes.h"
 #include "ui/gl/gl_export.h"
 
 namespace gfx {
 
 struct GL_EXPORT GLVersionInfo {
   GLVersionInfo(const char* version_str, const char* renderer_str,
                 const char* extensions_str);
 
   GLVersionInfo(const char* version_str, const char* renderer_str,
                 const std::set<std::string>& exts);
 
   bool IsAtLeastGL(unsigned major, unsigned minor) const {
     return !is_es && (major_version > major ||
                       (major_version == major && minor_version >= minor));
   }
 
+  bool IsLowerThanGL(unsigned major, unsigned minor) const {
+    return !is_es && (major_version < major ||
+                      (major_version == major && minor_version < minor));
+  }
+
   bool IsAtLeastGLES(unsigned major, unsigned minor) const {
     return is_es && (major_version > major ||
                      (major_version == major && minor_version >= minor));
   }
 
   bool BehavesLikeGLES() const {
     return is_es || is_desktop_core_profile;
   }
 
   static void ParseVersionString(const char* version_str,
@@ skipping 11 matching lines @@
 
  private:
   GLVersionInfo(const char* version_str, const char* renderer_str);
 
   DISALLOW_COPY_AND_ASSIGN(GLVersionInfo);
 };
 
 }  // namespace gfx
 
 #endif // UI_GL_GL_VERSION_INFO_H_