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

content/content_common.gypi

Index: content/content_common.gypi
diff --git a/content/content_common.gypi b/content/content_common.gypi
index 97590dfc1079b75503e43e788c246327bd771722..94f1b036a1170550a448d1d631ff1ae760d45a9b 100644
--- a/content/content_common.gypi
+++ b/content/content_common.gypi
@@ -1094,5 +1094,10 @@
         'common/gpu/gpu_memory_buffer_factory_ozone_native_pixmap.h',
       ],
     }],
+    ['use_vgem_map==1', {
+      'dependencies': [
+        '../build/linux/system.gyp:vgem_map',
+      ],
+    }],
   ],
 }