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

ui/ozone/platform/drm/gbm.gypi

 # 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.
 
 {
   'variables': {
     'internal_ozone_platform_deps': [
       'ozone_platform_gbm',
     ],
     'internal_ozone_platform_unittest_deps': [
       'ozone_platform_gbm_unittests',
     ],
     'internal_ozone_platforms': [
       'gbm',
     ],
     'use_mesa_platform_null%': 0,
 
-    # TODO(dshwang): remove this flag when all gbm hardware supports vgem map.
-    # crbug.com/519587
-    'use_vgem_map%': 0,
-
     'use_drm_atomic%': 0,
   },
   'targets': [
     {
       'target_name': 'ozone_platform_gbm',
       'type': 'static_library',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../build/linux/system.gyp:libdrm',
         '../../third_party/minigbm/minigbm.gyp:minigbm',
@@ skipping 97 matching lines @@
         'host/drm_overlay_manager.h',
         'host/drm_window_host.cc',
         'host/drm_window_host.h',
         'host/drm_window_host_manager.cc',
         'host/drm_window_host_manager.h',
         'ozone_platform_gbm.cc',
         'ozone_platform_gbm.h',
       ],
       'conditions': [
         ['use_vgem_map==1', {
-          'defines': ['USE_VGEM_MAP'],
+          'dependencies': [
+            '../ozone/ozone.gyp:vgem_map',
+          ],
           'sources': [
             'gpu/client_native_pixmap_vgem.cc',
             'gpu/client_native_pixmap_vgem.h',
           ],
         }],
         ['use_drm_atomic == 1', {
           'sources': [
             'gpu/hardware_display_plane_atomic.cc',
             'gpu/hardware_display_plane_atomic.h',
             'gpu/hardware_display_plane_manager_atomic.cc',
@@ skipping 26 matching lines @@
           'gpu/hardware_display_controller_unittest.cc',
           'gpu/hardware_display_plane_manager_unittest.cc',
           'gpu/screen_manager_unittest.cc',
           'test/mock_drm_device.cc',
           'test/mock_drm_device.h',
         ],
       },
     },
   ],
 }