diff --git a/src/components/script/dom/bindings/domparser.rs b/src/components/script/dom/bindings/domparser.rs
index 12534ca6d3f..586ef039911 100644
--- a/src/components/script/dom/bindings/domparser.rs
+++ b/src/components/script/dom/bindings/domparser.rs
@@ -3,12 +3,10 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use dom::bindings::codegen::DOMParserBinding;
-use dom::bindings::utils::{Reflectable, Reflector};
-use dom::bindings::utils::{BindingObject, DerivedWrapper};
+use dom::bindings::utils::{BindingObject, Reflectable, Reflector};
 use dom::domparser::DOMParser;
 
-use js::jsapi::{JSContext, JSObject, JSVal};
-use js::glue::{RUST_OBJECT_TO_JSVAL};
+use js::jsapi::{JSContext, JSObject};
 
 impl Reflectable for DOMParser {
     fn reflector<'a>(&'a self) -> &'a Reflector {
@@ -29,20 +27,3 @@ impl BindingObject for DOMParser {
         Some(self.owner as @mut Reflectable)
     }
 }
-
-impl DerivedWrapper for DOMParser {
-    fn wrap(&mut self, _cx: *JSContext, _scope: *JSObject, _vp: *mut JSVal) -> i32 {
-        fail!(~"nyi")
-    }
-
-    #[fixed_stack_segment]
-    fn wrap_shared(@mut self, cx: *JSContext, scope: *JSObject, vp: *mut JSVal) -> i32 {
-        let obj = self.wrap_object_shared(cx, scope);
-        if obj.is_null() {
-            return 0;
-        } else {
-            unsafe { *vp = RUST_OBJECT_TO_JSVAL(obj) };
-            return 1;
-        }
-    }
-}
diff --git a/src/components/script/dom/bindings/utils.rs b/src/components/script/dom/bindings/utils.rs
index f9d6367f5e5..0beb98d61c0 100644
--- a/src/components/script/dom/bindings/utils.rs
+++ b/src/components/script/dom/bindings/utils.rs
@@ -738,7 +738,6 @@ pub fn InitIds(cx: *JSContext, specs: &[JSPropertySpec], ids: &mut [jsid]) -> bo
 
 pub trait DerivedWrapper {
     fn wrap(&mut self, cx: *JSContext, scope: *JSObject, vp: *mut JSVal) -> i32;
-    fn wrap_shared(@mut self, cx: *JSContext, scope: *JSObject, vp: *mut JSVal) -> i32;
 }
 
 impl DerivedWrapper for AbstractNode<ScriptView> {
@@ -752,10 +751,6 @@ impl DerivedWrapper for AbstractNode<ScriptView> {
         unsafe { *vp = RUST_OBJECT_TO_JSVAL(node::create(cx, self)) };
         return 1;
     }
-
-    fn wrap_shared(@mut self, _cx: *JSContext, _scope: *JSObject, _vp: *mut JSVal) -> i32 {
-        fail!(~"nyi")
-    }
 }
 
 #[deriving(ToStr)]
diff --git a/src/components/script/dom/clientrect.rs b/src/components/script/dom/clientrect.rs
index 55ccaa8dfa9..543ea2a5f88 100644
--- a/src/components/script/dom/clientrect.rs
+++ b/src/components/script/dom/clientrect.rs
@@ -2,12 +2,11 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use dom::bindings::utils::{Reflectable, Reflector, BindingObject, DerivedWrapper};
+use dom::bindings::utils::{Reflectable, Reflector, BindingObject};
 use dom::bindings::codegen::ClientRectBinding;
 use script_task::page_from_context;
 
-use js::jsapi::{JSObject, JSContext, JSVal};
-use js::glue::RUST_OBJECT_TO_JSVAL;
+use js::jsapi::{JSObject, JSContext};
 
 pub struct ClientRect {
     reflector_: Reflector,
@@ -81,20 +80,3 @@ impl BindingObject for ClientRect {
         }
     }
 }
-
-impl DerivedWrapper for ClientRect {
-    fn wrap(&mut self, _cx: *JSContext, _scope: *JSObject, _vp: *mut JSVal) -> i32 {
-        fail!(~"nyi")
-    }
-
-    #[fixed_stack_segment]
-    fn wrap_shared(@mut self, cx: *JSContext, scope: *JSObject, vp: *mut JSVal) -> i32 {
-        let obj = self.wrap_object_shared(cx, scope);
-        if obj.is_null() {
-            return 0;
-        } else {
-            unsafe { *vp = RUST_OBJECT_TO_JSVAL(obj) };
-            return 1;
-        }
-    }
-}
diff --git a/src/components/script/dom/document.rs b/src/components/script/dom/document.rs
index 28ebe79fb49..26a9c7a88a9 100644
--- a/src/components/script/dom/document.rs
+++ b/src/components/script/dom/document.rs
@@ -192,10 +192,6 @@ impl DerivedWrapper for AbstractDocument {
         unsafe { *vp = RUST_OBJECT_TO_JSVAL(self.reflector().get_jsobject()) };
         return 1;
     }
-
-    fn wrap_shared(@mut self, _cx: *JSContext, _scope: *JSObject, _vp: *mut JSVal) -> i32 {
-        fail!(~"nyi")
-    }
 }
 
 
diff --git a/src/components/script/dom/event.rs b/src/components/script/dom/event.rs
index fb5be7a1d6b..2f5f8a96fd7 100644
--- a/src/components/script/dom/event.rs
+++ b/src/components/script/dom/event.rs
@@ -5,12 +5,11 @@
 use dom::eventtarget::EventTarget;
 use dom::window::Window;
 use dom::bindings::codegen::EventBinding;
-use dom::bindings::utils::{Reflectable, BindingObject, DerivedWrapper};
+use dom::bindings::utils::{Reflectable, BindingObject};
 use dom::bindings::utils::{DOMString, ErrorResult, Fallible, Reflector};
 
 use geom::point::Point2D;
-use js::glue::RUST_OBJECT_TO_JSVAL;
-use js::jsapi::{JSObject, JSContext, JSVal};
+use js::jsapi::{JSObject, JSContext};
 
 use script_task::page_from_context;
 
@@ -132,20 +131,3 @@ impl BindingObject for Event {
         }
     }
 }
-
-impl DerivedWrapper for Event {
-    fn wrap(&mut self, _cx: *JSContext, _scope: *JSObject, _vp: *mut JSVal) -> i32 {
-        fail!(~"nyi")
-    }
-
-    #[fixed_stack_segment]
-    fn wrap_shared(@mut self, cx: *JSContext, scope: *JSObject, vp: *mut JSVal) -> i32 {
-        let obj = self.wrap_object_shared(cx, scope);
-        if obj.is_null() {
-            return 0;
-        } else {
-            unsafe { *vp = RUST_OBJECT_TO_JSVAL(obj) };
-            return 1;
-        }
-    }
-}
diff --git a/src/components/script/dom/eventtarget.rs b/src/components/script/dom/eventtarget.rs
index 3ea1bead0eb..73d8867e144 100644
--- a/src/components/script/dom/eventtarget.rs
+++ b/src/components/script/dom/eventtarget.rs
@@ -3,11 +3,10 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use dom::bindings::codegen::EventTargetBinding;
-use dom::bindings::utils::{Reflectable, Reflector, BindingObject, DerivedWrapper};
+use dom::bindings::utils::{Reflectable, Reflector, BindingObject};
 use script_task::page_from_context;
 
-use js::glue::RUST_OBJECT_TO_JSVAL;
-use js::jsapi::{JSObject, JSContext, JSVal};
+use js::jsapi::{JSObject, JSContext};
 
 pub struct EventTarget {
     reflector_: Reflector
@@ -48,22 +47,3 @@ impl BindingObject for EventTarget {
         }
     }
 }
-
-impl DerivedWrapper for EventTarget {
-    fn wrap(&mut self, _cx: *JSContext, _scope: *JSObject, _vp: *mut JSVal) -> i32 {
-        fail!(~"nyi")
-    }
-
-    #[fixed_stack_segment]
-    fn wrap_shared(@mut self, cx: *JSContext, scope: *JSObject, vp: *mut JSVal) -> i32 {
-        let obj = self.wrap_object_shared(cx, scope);
-        if obj.is_null() {
-            return 0;
-        } else {
-            unsafe {
-                *vp = RUST_OBJECT_TO_JSVAL(obj)
-            };
-            return 1;
-        }
-    }
-}
diff --git a/src/components/script/dom/formdata.rs b/src/components/script/dom/formdata.rs
index b5551bbea2b..0a3917dfca0 100644
--- a/src/components/script/dom/formdata.rs
+++ b/src/components/script/dom/formdata.rs
@@ -2,14 +2,13 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use dom::bindings::utils::{Reflectable, BindingObject, DerivedWrapper};
+use dom::bindings::utils::{Reflectable, BindingObject};
 use dom::bindings::utils::{Reflector, DOMString, null_str_as_empty};
 use dom::bindings::codegen::FormDataBinding;
 use dom::blob::Blob;
 use script_task::{page_from_context};
 
-use js::jsapi::{JSObject, JSContext, JSVal};
-use js::glue::RUST_OBJECT_TO_JSVAL;
+use js::jsapi::{JSObject, JSContext};
 
 use std::hashmap::HashMap;
 
@@ -70,20 +69,3 @@ impl BindingObject for FormData {
         }
     }
 }
-
-impl DerivedWrapper for FormData {
-    fn wrap(&mut self, _cx: *JSContext, _scope: *JSObject, _vp: *mut JSVal) -> i32 {
-        fail!(~"nyi")
-    }
-
-    #[fixed_stack_segment]
-    fn wrap_shared(@mut self, cx: *JSContext, scope: *JSObject, vp: *mut JSVal) -> i32 {
-        let obj = self.wrap_object_shared(cx, scope);
-        if obj.is_null() {
-            return 0;
-        } else {
-            unsafe { *vp = RUST_OBJECT_TO_JSVAL(obj) };
-            return 1;
-        }
-    }
-}
diff --git a/src/components/script/dom/mouseevent.rs b/src/components/script/dom/mouseevent.rs
index b4f567046ca..e8e52be7939 100644
--- a/src/components/script/dom/mouseevent.rs
+++ b/src/components/script/dom/mouseevent.rs
@@ -4,14 +4,13 @@
 
 use dom::bindings::codegen::MouseEventBinding;
 use dom::bindings::utils::{ErrorResult, Fallible, DOMString};
-use dom::bindings::utils::{Reflectable, Reflector, BindingObject, DerivedWrapper};
+use dom::bindings::utils::{Reflectable, Reflector, BindingObject};
 use dom::eventtarget::EventTarget;
 use dom::uievent::UIEvent;
 use dom::window::Window;
 use dom::windowproxy::WindowProxy;
 
-use js::glue::RUST_OBJECT_TO_JSVAL;
-use js::jsapi::{JSObject, JSContext, JSVal};
+use js::jsapi::{JSObject, JSContext};
 
 pub struct MouseEvent {
     parent: UIEvent,
@@ -161,21 +160,3 @@ impl BindingObject for MouseEvent {
         self.parent.GetParentObject(cx)
     }
 }
-
-impl DerivedWrapper for MouseEvent {
-    fn wrap(&mut self, _cx: *JSContext, _scope: *JSObject, _vp: *mut JSVal) -> i32 {
-        fail!(~"nyi")
-    }
-
-    #[fixed_stack_segment]
-    fn wrap_shared(@mut self, cx: *JSContext, scope: *JSObject, vp: *mut JSVal) -> i32 {
-        let obj = self.wrap_object_shared(cx, scope);
-        if obj.is_null() {
-            return 0;
-        } else {
-            unsafe { *vp = RUST_OBJECT_TO_JSVAL(obj) };
-            return 1;
-        }
-    }
-
-}
diff --git a/src/components/script/dom/uievent.rs b/src/components/script/dom/uievent.rs
index ff71df37f17..5f1b8b175ba 100644
--- a/src/components/script/dom/uievent.rs
+++ b/src/components/script/dom/uievent.rs
@@ -4,14 +4,13 @@
 
 use dom::bindings::codegen::UIEventBinding;
 use dom::bindings::utils::{DOMString, Fallible};
-use dom::bindings::utils::{Reflectable, Reflector, BindingObject, DerivedWrapper};
+use dom::bindings::utils::{Reflectable, Reflector, BindingObject};
 use dom::node::{AbstractNode, ScriptView};
 use dom::event::Event;
 use dom::window::Window;
 use dom::windowproxy::WindowProxy;
 
-use js::glue::RUST_OBJECT_TO_JSVAL;
-use js::jsapi::{JSObject, JSContext, JSVal};
+use js::jsapi::{JSObject, JSContext};
 
 pub struct UIEvent {
     parent: Event,
@@ -134,20 +133,3 @@ impl BindingObject for UIEvent {
         self.parent.GetParentObject(cx)
     }
 }
-
-impl DerivedWrapper for UIEvent {
-    fn wrap(&mut self, _cx: *JSContext, _scope: *JSObject, _vp: *mut JSVal) -> i32 {
-        fail!(~"nyi")
-    }
-
-    #[fixed_stack_segment]
-    fn wrap_shared(@mut self, cx: *JSContext, scope: *JSObject, vp: *mut JSVal) -> i32 {
-        let obj = self.wrap_object_shared(cx, scope);
-        if obj.is_null() {
-            return 0;
-        } else {
-            unsafe { *vp = RUST_OBJECT_TO_JSVAL(obj) };
-            return 1;
-        }
-    }
-}