diff -r 000000000000 -r 6474c204b198 netwerk/base/src/nsDNSPrefetch.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/base/src/nsDNSPrefetch.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,51 @@
+/* -*- 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/. */
+
+#ifndef nsDNSPrefetch_h___
+#define nsDNSPrefetch_h___
+
+#include "nsWeakReference.h"
+#include "nsString.h"
+#include "mozilla/TimeStamp.h"
+#include "mozilla/Attributes.h"
+
+#include "nsIDNSListener.h"
+
+class nsIURI;
+class nsIDNSService;
+
+class nsDNSPrefetch MOZ_FINAL : public nsIDNSListener
+{
+public:
+    NS_DECL_THREADSAFE_ISUPPORTS
+    NS_DECL_NSIDNSLISTENER
+  
+    nsDNSPrefetch(nsIURI *aURI, nsIDNSListener *aListener, bool storeTiming);
+    bool TimingsValid() const {
+        return !mStartTimestamp.IsNull() && !mEndTimestamp.IsNull();
+    }
+    // Only use the two timings if TimingsValid() returns true
+    const mozilla::TimeStamp& StartTimestamp() const { return mStartTimestamp; }
+    const mozilla::TimeStamp& EndTimestamp() const { return mEndTimestamp; }
+
+    static nsresult Initialize(nsIDNSService *aDNSService);
+    static nsresult Shutdown();
+
+    // Call one of the following methods to start the Prefetch.
+    nsresult PrefetchHigh(bool refreshDNS = false);
+    nsresult PrefetchMedium(bool refreshDNS = false);
+    nsresult PrefetchLow(bool refreshDNS = false);
+  
+private:
+    nsCString mHostname;
+    bool mStoreTiming;
+    mozilla::TimeStamp mStartTimestamp;
+    mozilla::TimeStamp mEndTimestamp;
+    nsWeakPtr mListener;
+
+    nsresult Prefetch(uint16_t flags);
+};
+
+#endif