From f3dcef8c8176ba3d76f0816cbbcb43eb8a58fdd9 Mon Sep 17 00:00:00 2001
From: Cameron McCormack <cam@mcc.id.au>
Date: Wed, 5 Apr 2017 16:54:51 +0800
Subject: [PATCH] style: Add an Atom::from_addrefed function.

---
 components/style/gecko_string_cache/mod.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/components/style/gecko_string_cache/mod.rs b/components/style/gecko_string_cache/mod.rs
index 1c44df4eb17..587c2329d96 100644
--- a/components/style/gecko_string_cache/mod.rs
+++ b/components/style/gecko_string_cache/mod.rs
@@ -198,6 +198,16 @@ impl Atom {
                       "Called from_static for a non-static atom!");
         atom
     }
+
+    /// Creates an atom from a dynamic atom pointer that has already had AddRef
+    /// called on it.
+    #[inline]
+    pub unsafe fn from_addrefed(ptr: *mut nsIAtom) -> Self {
+        debug_assert!(!ptr.is_null());
+        unsafe {
+            Atom(WeakAtom::new(ptr))
+        }
+    }
 }
 
 impl Hash for Atom {