diff -r 000000000000 -r 6474c204b198 xpcom/glue/nsClassInfoImpl.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/glue/nsClassInfoImpl.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,78 @@
+/* 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 "nsIClassInfoImpl.h"
+#include "nsIProgrammingLanguage.h"
+
+NS_IMETHODIMP_(MozExternalRefCountType)
+GenericClassInfo::AddRef()
+{
+  return 2;
+}
+
+NS_IMETHODIMP_(MozExternalRefCountType)
+GenericClassInfo::Release()
+{
+  return 1;
+}
+
+NS_IMPL_QUERY_INTERFACE(GenericClassInfo, nsIClassInfo)
+
+NS_IMETHODIMP
+GenericClassInfo::GetInterfaces(uint32_t* countp, nsIID*** array)
+{
+  return mData->getinterfaces(countp, array);
+}
+
+NS_IMETHODIMP
+GenericClassInfo::GetHelperForLanguage(uint32_t language, nsISupports** helper)
+{
+  if (mData->getlanguagehelper)
+    return mData->getlanguagehelper(language, helper);
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+GenericClassInfo::GetContractID(char** contractid)
+{
+  NS_ERROR("GetContractID not implemented");
+  *contractid = nullptr;
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+GenericClassInfo::GetClassDescription(char** description)
+{
+  *description = nullptr;
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+GenericClassInfo::GetClassID(nsCID** classid)
+{
+  NS_ERROR("GetClassID not implemented");
+  *classid = nullptr;
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+GenericClassInfo::GetImplementationLanguage(uint32_t* language)
+{
+  *language = nsIProgrammingLanguage::CPLUSPLUS;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GenericClassInfo::GetFlags(uint32_t* flags)
+{
+  *flags = mData->flags;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GenericClassInfo::GetClassIDNoAlloc(nsCID* aClassIDNoAlloc)
+{
+  *aClassIDNoAlloc = mData->cid;
+  return NS_OK;
+}