Revert of ozone: Remove the "drm" software composited platform

ui/ozone/platform/drm/gbm.gypi

Index: ui/ozone/platform/drm/gbm.gypi
diff --git a/ui/ozone/platform/drm/gbm.gypi b/ui/ozone/platform/drm/gbm.gypi
index 2395ac1cd5975a1ff79dd82cd5696b7b1709e463..cc852a2b59e191b54ac0adf8c1e68681ab2538c2 100644
--- a/ui/ozone/platform/drm/gbm.gypi
+++ b/ui/ozone/platform/drm/gbm.gypi
@@ -29,16 +29,11 @@
         '../../skia/skia.gyp:skia',
         '../../third_party/khronos/khronos.gyp:khronos_headers',
         '../base/ui_base.gyp:ui_base',
-        '../display/display.gyp:display_types',
-        '../display/display.gyp:display_util',
-        '../events/devices/events_devices.gyp:events_devices',
         '../events/events.gyp:events',
         '../events/ozone/events_ozone.gyp:events_ozone',
         '../events/ozone/events_ozone.gyp:events_ozone_evdev',
         '../events/ozone/events_ozone.gyp:events_ozone_layout',
-        '../events/platform/events_platform.gyp:events_platform',
         '../gfx/gfx.gyp:gfx',
-        '../gfx/gfx.gyp:gfx_geometry',
       ],
       'defines': [
         'OZONE_IMPLEMENTATION',
@@ -46,33 +41,6 @@
       'sources': [
         'common/client_native_pixmap_factory_gbm.cc',
         'common/client_native_pixmap_factory_gbm.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',
-        'gpu/drm_console_buffer.h',
-        'gpu/drm_device.cc',
-        'gpu/drm_device.h',
-        'gpu/drm_device_generator.cc',
-        'gpu/drm_device_generator.h',
-        'gpu/drm_device_manager.cc',
-        'gpu/drm_device_manager.h',
-        'gpu/drm_display.cc',
-        'gpu/drm_display.h',
-        'gpu/drm_gpu_display_manager.cc',
-        'gpu/drm_gpu_display_manager.h',
-        'gpu/drm_gpu_platform_support.cc',
-        'gpu/drm_gpu_platform_support.h',
-        'gpu/drm_vsync_provider.cc',
-        'gpu/drm_vsync_provider.h',
-        'gpu/drm_window.cc',
-        'gpu/drm_window.h',
         'gpu/gbm_buffer.cc',
         'gpu/gbm_buffer.h',
         'gpu/gbm_buffer_base.cc',
@@ -85,41 +53,6 @@
         'gpu/gbm_surface_factory.h',
         'gpu/gbm_surfaceless.cc',
         'gpu/gbm_surfaceless.h',
-        'gpu/hardware_display_controller.cc',
-        'gpu/hardware_display_controller.h',
-        'gpu/hardware_display_plane.cc',
-        'gpu/hardware_display_plane.h',
-        'gpu/hardware_display_plane_manager.cc',
-        'gpu/hardware_display_plane_manager.h',
-        'gpu/hardware_display_plane_manager_legacy.cc',
-        'gpu/hardware_display_plane_manager_legacy.h',
-        'gpu/overlay_plane.cc',
-        'gpu/overlay_plane.h',
-        'gpu/page_flip_request.cc',
-        'gpu/page_flip_request.h',
-        'gpu/screen_manager.cc',
-        'gpu/screen_manager.h',
-        'host/channel_observer.h',
-        'host/drm_cursor.cc',
-        'host/drm_cursor.h',
-        'host/drm_device_handle.cc',
-        'host/drm_device_handle.h',
-        'host/drm_display_host.cc',
-        'host/drm_display_host.h',
-        'host/drm_display_host_manager.cc',
-        'host/drm_display_host_manager.h',
-        'host/drm_gpu_platform_support_host.cc',
-        'host/drm_gpu_platform_support_host.h',
-        'host/drm_native_display_delegate.cc',
-        'host/drm_native_display_delegate.h',
-        'host/drm_overlay_candidates_host.cc',
-        'host/drm_overlay_candidates_host.h',
-        'host/drm_overlay_manager.cc',
-        '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',
       ],
@@ -134,44 +67,10 @@
             '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',
-	    'gpu/hardware_display_plane_manager_atomic.h',
-	  ],
-	  'defines': [
-	    'USE_DRM_ATOMIC=1',
-	  ],
+	['use_drm_atomic==1', {
+	  'defines': ['USE_DRM_ATOMIC'],
 	}],
       ],
     },
-    {
-      'target_name': 'ozone_platform_gbm_unittests',
-      'type': 'none',
-      'dependencies': [
-        '../../build/linux/system.gyp:libdrm',
-        '../../skia/skia.gyp:skia',
-        '../gfx/gfx.gyp:gfx',
-        '../gfx/gfx.gyp:gfx_geometry',
-        'ozone.gyp:ozone',
-      ],
-      'export_dependent_settings': [
-        '../../build/linux/system.gyp:libdrm',
-        '../../skia/skia.gyp:skia',
-        '../gfx/gfx.gyp:gfx_geometry',
-      ],
-      'direct_dependent_settings': {
-        'sources': [
-          'gpu/drm_window_unittest.cc',
-          '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',
-        ],
-      },
-    },
   ],
 }