3 files changed, 7 insertions, 17 deletions
diff --git a/src/components/script/dom/bindings/codegen/CodegenRust.py b/src/components/script/dom/bindings/codegen/CodegenRust.py
index 58e805a0c19..17001fd734a 100644
--- a/src/components/script/dom/bindings/codegen/CodegenRust.py
+++ b/src/components/script/dom/bindings/codegen/CodegenRust.py
@@ -1757,7 +1757,8 @@ def CreateBindingJSObject(descriptor, parent=None):
         assert not descriptor.createGlobal
         create += """
 let js_info = aScope.deref().page().js_info();
-let handler = js_info.get_ref().dom_static.proxy_handlers.deref().get(&(PrototypeList::id::%s as uint));
+let mut handlers = js_info.get_ref().dom_static.proxy_handlers.deref().borrow_mut();
+let handler = handlers.get(&(PrototypeList::id::%s as uint));
 let mut private = PrivateValue(squirrel_away_unique(aObject) as *libc::c_void);
 let obj = with_compartment(aCx, proto, || {
   NewProxyObject(aCx, *handler,
@@ -2080,7 +2081,8 @@ class CGDefineDOMInterfaceMethod(CGAbstractMethod):
   getPrototypeOf: None,
   trace: Some(%s)
 };
-js_info.dom_static.proxy_handlers.insert(PrototypeList::id::%s as uint,
+let mut handlers = js_info.dom_static.proxy_handlers.deref().borrow_mut();
+handlers.insert(PrototypeList::id::%s as uint,
                                          CreateProxyHandler(&traps, &Class as *_ as *_));
 
 """ % (FINALIZE_HOOK_NAME,
diff --git a/src/components/script/dom/bindings/trace.rs b/src/components/script/dom/bindings/trace.rs
index 1c3655bbde3..8cbf32e0cbd 100644
--- a/src/components/script/dom/bindings/trace.rs
+++ b/src/components/script/dom/bindings/trace.rs
@@ -104,12 +104,6 @@ impl<T> Deref<T> for Untraceable<T> {
     }
 }
 
-impl<T> DerefMut<T> for Untraceable<T> {
-    fn deref_mut<'a>(&'a mut self) -> &'a mut T {
-        &mut self.inner
-    }
-}
-
 /// Encapsulates a type that can be traced but is boxed in a type we don't control
 /// (such as RefCell). Wrap a field in Traceable and implement the Encodable trait
 /// for that new concrete type to achieve magic compiler-derived trace hooks.
@@ -135,12 +129,6 @@ impl<T> Deref<T> for Traceable<T> {
     }
 }
 
-impl<T> DerefMut<T> for Traceable<T> {
-    fn deref_mut<'a>(&'a mut self) -> &'a mut T {
-        &mut self.inner
-    }
-}
-
 impl<S: Encoder<E>, E, T: Encodable<S, E>> Encodable<S, E> for Traceable<RefCell<T>> {
     fn encode(&self, s: &mut S) -> Result<(), E> {
         self.borrow().encode(s)
diff --git a/src/components/script/dom/bindings/utils.rs b/src/components/script/dom/bindings/utils.rs
index d2c1a43ccf8..2c494c2008e 100644
--- a/src/components/script/dom/bindings/utils.rs
+++ b/src/components/script/dom/bindings/utils.rs
@@ -14,7 +14,7 @@ use servo_util::str::DOMString;
 use std::collections::hashmap::HashMap;
 use libc;
 use libc::c_uint;
-use std::cell::Cell;
+use std::cell::{Cell, RefCell};
 use std::mem;
 use std::cmp::PartialEq;
 use std::ptr;
@@ -52,13 +52,13 @@ use js;
 #[allow(raw_pointer_deriving)]
 #[deriving(Encodable)]
 pub struct GlobalStaticData {
-    pub proxy_handlers: Untraceable<HashMap<uint, *libc::c_void>>,
+    pub proxy_handlers: Untraceable<RefCell<HashMap<uint, *libc::c_void>>>,
     pub windowproxy_handler: Untraceable<*libc::c_void>,
 }
 
 pub fn GlobalStaticData() -> GlobalStaticData {
     GlobalStaticData {
-        proxy_handlers: Untraceable::new(HashMap::new()),
+        proxy_handlers: Untraceable::new(RefCell::new(HashMap::new())),
         windowproxy_handler: Untraceable::new(browsercontext::new_window_proxy_handler()),
     }
 }