1 files changed, 4 insertions, 0 deletions
diff --git a/components/shared/gfx/lib.rs b/components/shared/gfx/lib.rs
index e5699f2504a..032dcfd19e0 100644
--- a/components/shared/gfx/lib.rs
+++ b/components/shared/gfx/lib.rs
@@ -4,6 +4,8 @@
 
 #![deny(unsafe_code)]
 
+use std::sync::Arc;
+
 use malloc_size_of_derive::MallocSizeOf;
 use range::{int_range_index, RangeIndex};
 use serde::{Deserialize, Serialize};
@@ -14,3 +16,5 @@ int_range_index! {
     /// the middle of a glyph.
     struct ByteIndex(isize)
 }
+
+pub type WebFontLoadFinishedCallback = Arc<dyn Fn(bool) + Send + Sync + 'static>;