Use nv contrl x extension to query nvidia driver version.

third_party/libXNVCtrl/libXNVCtrl.gyp

Index: third_party/libXNVCtrl/libXNVCtrl.gyp
===================================================================
--- third_party/libXNVCtrl/libXNVCtrl.gyp	(revision 0)
+++ third_party/libXNVCtrl/libXNVCtrl.gyp	(revision 0)
@@ -0,0 +1,18 @@
+# Copyright (c) 2012 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.
+
+{
+  'targets': [
+    {
+      'target_name': 'libXNVCtrl',
+      'type': 'static_library',
+      'sources': [
+        'NVCtrl.c',
+        'NVCtrl.h',
+        'NVCtrlLib.h',
+        'nv_control.h',
+      ],
+    },
+  ],
+}
Property changes on: third_party/libXNVCtrl/libXNVCtrl.gyp
___________________________________________________________________
Added: svn:eol-style
   + LF