NotForReview: Implement zero/one-copy texture for ozone freon using Intel DRM

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 b160e8f3ae7f32d40a9d8e42d3aac9a476dc1957..c1d01511a027ab6c71fca1a1b15d7fa257cd2a8d 100644
--- a/ui/ozone/platform/drm/gbm.gypi
+++ b/ui/ozone/platform/drm/gbm.gypi
@@ -52,6 +52,17 @@
         ['use_mesa_platform_null==1', {
           'defines': ['USE_MESA_PLATFORM_NULL'],
         }],
+        ['target_arch=="ia32" or target_arch=="x64"', {
+          'sources': [
+            '../../public/platform/drm_intel_buffer_manager.h',
+            'gpu/drm_intel_buffer_manager.cc',
+            'gpu/gbm_map_pixmap_intel.cc',
+            'gpu/gbm_map_pixmap_intel.h',
+          ],
+          'dependencies': [
+            '../../build/linux/system.gyp:libdrm_intel',
+          ],
+        }],
       ],
     },
   ],