diff -r 000000000000 -r 6474c204b198 xpcom/base/nsConsoleMessage.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/base/nsConsoleMessage.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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/. */
+
+/*
+ * Base implementation for console messages.
+ */
+
+#include "nsConsoleMessage.h"
+#include "jsapi.h"
+
+NS_IMPL_ISUPPORTS(nsConsoleMessage, nsIConsoleMessage)
+
+nsConsoleMessage::nsConsoleMessage()
+    :  mTimeStamp(0),
+       mMessage()
+{
+}
+
+nsConsoleMessage::nsConsoleMessage(const char16_t *message)
+{
+  mTimeStamp = JS_Now() / 1000;
+  mMessage.Assign(message);
+}
+
+NS_IMETHODIMP
+nsConsoleMessage::GetMessageMoz(char16_t **result)
+{
+  *result = ToNewUnicode(mMessage);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsConsoleMessage::GetTimeStamp(int64_t *aTimeStamp)
+{
+  *aTimeStamp = mTimeStamp;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsConsoleMessage::ToString(nsACString& /*UTF8*/ aResult)
+{
+  CopyUTF16toUTF8(mMessage, aResult);
+
+  return NS_OK;
+}