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-rw-r--r--components/script/dom/bindings/str.rs4
1 files changed, 3 insertions, 1 deletions
diff --git a/components/script/dom/bindings/str.rs b/components/script/dom/bindings/str.rs
index 5ee26f86543..26a4b6149a9 100644
--- a/components/script/dom/bindings/str.rs
+++ b/components/script/dom/bindings/str.rs
@@ -11,8 +11,10 @@ use std::ops;
use std::str;
use std::str::FromStr;
+use util::mem::HeapSizeOf;
+
/// Encapsulates the IDL `ByteString` type.
-#[derive(JSTraceable,Clone,Eq,PartialEq)]
+#[derive(JSTraceable, Clone, Eq, PartialEq, HeapSizeOf)]
pub struct ByteString(Vec<u8>);
impl ByteString {