3 files changed, 70 insertions, 0 deletions
diff --git a/components/style_traits/arc_slice.rs b/components/style_traits/arc_slice.rs
index bbbac1a0757..f5d0c56e7fc 100644
--- a/components/style_traits/arc_slice.rs
+++ b/components/style_traits/arc_slice.rs
@@ -4,6 +4,8 @@
 
 //! A thin atomically-reference-counted slice.
 
+use serde::de::{Deserialize, Deserializer};
+use serde::ser::{Serialize, Serializer};
 use servo_arc::ThinArc;
 use std::ops::Deref;
 use std::ptr::NonNull;
@@ -60,6 +62,25 @@ impl<T> Default for ArcSlice<T> {
     }
 }
 
+impl<T: Serialize> Serialize for ArcSlice<T> {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        self.deref().serialize(serializer)
+    }
+}
+
+impl<'de, T: Deserialize<'de>> Deserialize<'de> for ArcSlice<T> {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let r = Vec::deserialize(deserializer)?;
+        Ok(ArcSlice::from_iter(r.into_iter()))
+    }
+}
+
 impl<T> ArcSlice<T> {
     /// Creates an Arc for a slice using the given iterator to generate the
     /// slice.
diff --git a/components/style_traits/owned_slice.rs b/components/style_traits/owned_slice.rs
index 33d3ac1c2ab..bbce7065196 100644
--- a/components/style_traits/owned_slice.rs
+++ b/components/style_traits/owned_slice.rs
@@ -7,6 +7,8 @@
 //! A replacement for `Box<[T]>` that cbindgen can understand.
 
 use malloc_size_of::{MallocShallowSizeOf, MallocSizeOf, MallocSizeOfOps};
+use serde::de::{Deserialize, Deserializer};
+use serde::ser::{Serialize, Serializer};
 use std::marker::PhantomData;
 use std::ops::{Deref, DerefMut};
 use std::ptr::NonNull;
@@ -171,3 +173,22 @@ impl<T> iter::FromIterator<T> for OwnedSlice<T> {
         Vec::from_iter(iter).into()
     }
 }
+
+impl<T: Serialize> Serialize for OwnedSlice<T> {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        self.deref().serialize(serializer)
+    }
+}
+
+impl<'de, T: Deserialize<'de>> Deserialize<'de> for OwnedSlice<T> {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let r = Box::<[T]>::deserialize(deserializer)?;
+        Ok(r.into())
+    }
+}
diff --git a/components/style_traits/owned_str.rs b/components/style_traits/owned_str.rs
index 42a83a07713..ebfdcd5e066 100644
--- a/components/style_traits/owned_str.rs
+++ b/components/style_traits/owned_str.rs
@@ -38,6 +38,34 @@ impl DerefMut for OwnedStr {
     }
 }
 
+impl OwnedStr {
+    /// Convert the OwnedStr into a boxed str.
+    #[inline]
+    pub fn into_box(self) -> Box<str> {
+        self.into_string().into_boxed_str()
+    }
+
+    /// Convert the OwnedStr into a `String`.
+    #[inline]
+    pub fn into_string(self) -> String {
+        unsafe { String::from_utf8_unchecked(self.0.into_vec()) }
+    }
+}
+
+impl From<OwnedStr> for String {
+    #[inline]
+    fn from(b: OwnedStr) -> Self {
+        b.into_string()
+    }
+}
+
+impl From<OwnedStr> for Box<str> {
+    #[inline]
+    fn from(b: OwnedStr) -> Self {
+        b.into_box()
+    }
+}
+
 impl From<Box<str>> for OwnedStr {
     #[inline]
     fn from(b: Box<str>) -> Self {