--- a/dom/base/nsWindowRoot.cpp
+++ b/dom/base/nsWindowRoot.cpp
@@ -1,44 +1,44 @@
 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * 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/. */
 
 #include "mozilla/BasicEvents.h"
 #include "mozilla/EventDispatcher.h"
 #include "mozilla/EventListenerManager.h"
+#include "mozilla/dom/WindowRootBinding.h"
 #include "nsCOMPtr.h"
 #include "nsWindowRoot.h"
 #include "nsPIDOMWindow.h"
 #include "nsPresContext.h"
 #include "nsLayoutCID.h"
 #include "nsContentCID.h"
 #include "nsString.h"
 #include "nsGlobalWindow.h"
 #include "nsFocusManager.h"
 #include "nsIContent.h"
 #include "nsIDOMHTMLInputElement.h"
 #include "nsIDOMHTMLTextAreaElement.h"
 #include "nsIControllers.h"
 #include "nsIController.h"
-
+#include "xpcpublic.h"
 #include "nsCycleCollectionParticipant.h"
 
 #ifdef MOZ_XUL
 #include "nsIDOMXULElement.h"
 #endif
 
 using namespace mozilla;
 using namespace mozilla::dom;
 
 nsWindowRoot::nsWindowRoot(nsPIDOMWindow* aWindow)
 {
   mWindow = aWindow;
-  SetIsNotDOMBinding();
 }
 
 nsWindowRoot::~nsWindowRoot()
 {
   if (mListenerManager) {
     mListenerManager->Disconnect();
   }
 }
@@ -288,16 +288,28 @@ nsWindowRoot::GetPopupNode()
 }
 
 void
 nsWindowRoot::SetPopupNode(nsIDOMNode* aNode)
 {
   mPopupNode = aNode;
 }
 
+nsIGlobalObject*
+nsWindowRoot::GetParentObject()
+{
+  return xpc::NativeGlobal(xpc::PrivilegedJunkScope());
+}
+
+JSObject*
+nsWindowRoot::WrapObject(JSContext* aCx)
+{
+  return mozilla::dom::WindowRootBinding::Wrap(aCx, this);
+}
+
 ///////////////////////////////////////////////////////////////////////////////////
 
 already_AddRefed<EventTarget>
 NS_NewWindowRoot(nsPIDOMWindow* aWindow)
 {
   nsCOMPtr<EventTarget> result = new nsWindowRoot(aWindow);
   return result.forget();
 }

--- a/dom/base/nsWindowRoot.h
+++ b/dom/base/nsWindowRoot.h
@@ -5,16 +5,17 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #ifndef nsWindowRoot_h__
 #define nsWindowRoot_h__
 
 class nsPIDOMWindow;
 class nsIDOMEventListener;
 class nsIDOMEvent;
+class nsIGlobalObject;
 
 namespace mozilla {
 class EventChainPostVisitor;
 class EventChainPreVisitor;
 } // namespace mozilla
 
 #include "mozilla/Attributes.h"
 #include "mozilla/EventListenerManager.h"
@@ -56,20 +57,19 @@ public:
 
   virtual void SetParentTarget(mozilla::dom::EventTarget* aTarget) MOZ_OVERRIDE
   {
     mParent = aTarget;
   }
   virtual mozilla::dom::EventTarget* GetParentTarget() MOZ_OVERRIDE { return mParent; }
   virtual nsIDOMWindow* GetOwnerGlobal() MOZ_OVERRIDE;
 
-  virtual JSObject* WrapObject(JSContext* cx) MOZ_OVERRIDE
-  {
-    MOZ_CRASH("nsWindowRoot doesn't use DOM bindings!");
-  }
+  nsIGlobalObject* GetParentObject();
+
+  virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
 
   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(nsWindowRoot,
                                                          nsIDOMEventTarget)
 
 protected:
   virtual ~nsWindowRoot();
 
   // Members

--- a/dom/bindings/Bindings.conf
+++ b/dom/bindings/Bindings.conf
@@ -1470,16 +1470,20 @@ DOMInterfaces = {
     'concrete': False
 },
 {
     # We need a worker descriptor for WindowProxy because EventTarget exists in
     # workers.  But it's an external interface, so it'll just map to JSObject*.
     'workers': True
 }],
 
+'WindowRoot': {
+    'nativeType': 'nsWindowRoot'
+},
+
 'Worker': {
     'headerFile': 'mozilla/dom/WorkerPrivate.h',
     'nativeType': 'mozilla::dom::workers::WorkerPrivate',
     'implicitJSContext': [
         'terminate',
     ],
 },
 

new file mode 100644
--- /dev/null
+++ b/dom/webidl/WindowRoot.webidl
@@ -0,0 +1,9 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * 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/.
+ */
+
+[ChromeOnly]
+interface WindowRoot : EventTarget {
+};

--- a/dom/webidl/moz.build
+++ b/dom/webidl/moz.build
@@ -519,16 +519,17 @@ WEBIDL_FILES = [
     'VTTRegion.webidl',
     'WaveShaperNode.webidl',
     'WebComponents.webidl',
     'WebGL2RenderingContext.webidl',
     'WebGLRenderingContext.webidl',
     'WebSocket.webidl',
     'WheelEvent.webidl',
     'WifiOptions.webidl',
+    'WindowRoot.webidl',
     'Worker.webidl',
     'WorkerGlobalScope.webidl',
     'WorkerLocation.webidl',
     'WorkerNavigator.webidl',
     'XMLDocument.webidl',
     'XMLHttpRequest.webidl',
     'XMLHttpRequestEventTarget.webidl',
     'XMLHttpRequestUpload.webidl',