ozone gbm: whitelist 3 DRM ioctl code for native GpuMemoryBuffer.

ui/ozone/ozone.gyp

 # Copyright 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.
 
 {
   'variables': {
     'chromium_code': 1,
     # Normally, the external_ozone_platform* variables below can be
     # overridden by supplement.gypi which must exist exactly one level
     # below the top-level src directory. They can now also be set in
@@ skipping 207 matching lines @@
     ['<(ozone_platform_gbm) == 1', {
       'includes': [
         'platform/drm/gbm.gypi',
       ],
     }],
     ['<(ozone_platform_test) == 1', {
       'includes': [
         'platform/test/test.gypi',
       ],
     }],
+    ['use_vgem_map==1', {
+      'targets': [
+        {
+          'target_name': 'vgem_map',
+          'type': 'none',
+          'direct_dependent_settings': {
+            'defines': [
+              'USE_VGEM_MAP',
+            ],
+          },
+        },
+      ],
+    }],
   ],
 }