diff -r 000000000000 -r 6474c204b198 image/src/ScriptedNotificationObserver.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/image/src/ScriptedNotificationObserver.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,49 @@
+/* -*- 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 "ScriptedNotificationObserver.h"
+#include "imgIScriptedNotificationObserver.h"
+#include "nsCycleCollectionParticipant.h"
+
+using namespace mozilla::image;
+
+NS_IMPL_CYCLE_COLLECTION(ScriptedNotificationObserver, mInner)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ScriptedNotificationObserver)
+  NS_INTERFACE_MAP_ENTRY(imgINotificationObserver)
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(ScriptedNotificationObserver)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(ScriptedNotificationObserver)
+
+ScriptedNotificationObserver::ScriptedNotificationObserver(
+    imgIScriptedNotificationObserver* aInner)
+: mInner(aInner)
+{
+}
+
+NS_IMETHODIMP
+ScriptedNotificationObserver::Notify(imgIRequest* aRequest,
+                                     int32_t aType,
+                                     const nsIntRect* /*aUnused*/)
+{
+  if (aType == imgINotificationObserver::SIZE_AVAILABLE)
+    return mInner->SizeAvailable(aRequest);
+  if (aType == imgINotificationObserver::FRAME_UPDATE)
+    return mInner->FrameUpdate(aRequest);
+  if (aType == imgINotificationObserver::FRAME_COMPLETE)
+    return mInner->FrameComplete(aRequest);
+  if (aType == imgINotificationObserver::DECODE_COMPLETE)
+    return mInner->DecodeComplete(aRequest);
+  if (aType == imgINotificationObserver::LOAD_COMPLETE)
+    return mInner->LoadComplete(aRequest);
+  if (aType == imgINotificationObserver::DISCARD)
+    return mInner->Discard(aRequest);
+  if (aType == imgINotificationObserver::IS_ANIMATED)
+    return mInner->IsAnimated(aRequest);
+  return NS_OK;
+}