diff -r 000000000000 -r 6474c204b198 dom/time/TimeService.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/time/TimeService.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,35 @@
+/* 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/. */
+
+#ifndef mozilla_dom_time_TimeService_h
+#define mozilla_dom_time_TimeService_h
+
+#include "mozilla/StaticPtr.h"
+#include "nsITimeService.h"
+
+namespace mozilla {
+namespace dom {
+namespace time {
+
+/**
+ * This class implements a service which lets us modify the system clock time.
+ */
+class TimeService : public nsITimeService
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSITIMESERVICE
+
+  virtual ~TimeService() {};
+  static already_AddRefed<TimeService> GetInstance();
+
+private:
+  static StaticRefPtr<TimeService> sSingleton;
+};
+
+} // namespace time
+} // namespace dom
+} // namespace mozilla
+
+#endif //mozilla_dom_time_TimeService_h