diff -r 000000000000 -r 6474c204b198 dom/bindings/Date.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/bindings/Date.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+/* Representation for dates. */
+
+#ifndef mozilla_dom_Date_h
+#define mozilla_dom_Date_h
+
+#include "js/TypeDecls.h"
+
+namespace mozilla {
+namespace dom {
+
+class Date
+{
+public:
+  // Not inlining much here to avoid the includes we'd need.
+  Date();
+  Date(double aMilliseconds)
+    : mMsecSinceEpoch(aMilliseconds)
+  {}
+
+  bool IsUndefined() const;
+  double TimeStamp() const
+  {
+    return mMsecSinceEpoch;
+  }
+  void SetTimeStamp(double aMilliseconds)
+  {
+    mMsecSinceEpoch = aMilliseconds;
+  }
+  // Can return false if CheckedUnwrap fails.  This will NOT throw;
+  // callers should do it as needed.
+  bool SetTimeStamp(JSContext* aCx, JSObject* aObject);
+
+  bool ToDateObject(JSContext* aCx, JS::MutableHandle<JS::Value> aRval) const;
+
+private:
+  double mMsecSinceEpoch;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_Date_h