Implement DRM Native Pixmap using prime buffer

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': [
@@ skipping 42 matching lines @@
         '../gfx/gfx.gyp:gfx',
         '../gfx/gfx.gyp:gfx_geometry',
         'drm_atomic',
       ],
       'defines': [
         'OZONE_IMPLEMENTATION',
       ],
       'sources': [
         'client_native_pixmap_factory_gbm.cc',
         'client_native_pixmap_factory_gbm.h',
+        'common/client_native_pixmap_dmabuf.cc',
+        'common/client_native_pixmap_dmabuf.h',
         'common/drm_util.cc',
         'common/drm_util.h',
         'common/scoped_drm_types.cc',
         'common/scoped_drm_types.h',
         'gpu/crtc_controller.cc',
         'gpu/crtc_controller.h',
         'gpu/display_change_observer.h',
         'gpu/drm_buffer.cc',
         'gpu/drm_buffer.h',
         'gpu/drm_console_buffer.cc',
@@ skipping 71 matching lines @@
         'host/drm_window_host.cc',
         'host/drm_window_host.h',
         'host/drm_window_host_manager.cc',
         'host/drm_window_host_manager.h',
         'host/gpu_thread_adapter.h',
         'host/gpu_thread_observer.h',
         'ozone_platform_gbm.cc',
         'ozone_platform_gbm.h',
       ],
       'conditions': [
-        ['use_vgem_map==1', {
-          'dependencies': [
-            '../ozone/ozone.gyp:vgem_map',
-          ],
-          'sources': [
-            'common/client_native_pixmap_vgem.cc',
-            'common/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',
             'gpu/hardware_display_plane_manager_atomic.h',
           ],
         }],
       ],
     },
@@ skipping 31 matching lines @@
           'gpu/mock_scanout_buffer.cc',
           'gpu/mock_scanout_buffer.h',
           'gpu/mock_scanout_buffer_generator.cc',
           'gpu/mock_scanout_buffer_generator.h',
           'gpu/screen_manager_unittest.cc',
         ],
       },
     },
   ],
 }