diff -r 000000000000 -r 6474c204b198 netwerk/protocol/http/NullHttpTransaction.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/protocol/http/NullHttpTransaction.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,64 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+
+/* 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_net_NullHttpTransaction_h
+#define mozilla_net_NullHttpTransaction_h
+
+#include "nsAHttpTransaction.h"
+#include "mozilla/Attributes.h"
+
+// This is the minimal nsAHttpTransaction implementation. A NullHttpTransaction
+// can be used to drive connection level semantics (such as SSL handshakes
+// tunnels) so that a nsHttpConnection becomes fully established in
+// anticipation of a real transaction needing to use it soon.
+
+namespace mozilla { namespace net {
+
+class nsAHttpConnection;
+class nsHttpConnectionInfo;
+class nsHttpRequestHead;
+
+class NullHttpTransaction MOZ_FINAL : public nsAHttpTransaction
+{
+public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSAHTTPTRANSACTION
+
+  NullHttpTransaction(nsHttpConnectionInfo *ci,
+                      nsIInterfaceRequestor *callbacks,
+                      uint32_t caps);
+  ~NullHttpTransaction();
+
+  nsHttpConnectionInfo *ConnectionInfo() { return mConnectionInfo; }
+
+  // Overload of nsAHttpTransaction methods
+  bool IsNullTransaction() MOZ_OVERRIDE MOZ_FINAL { return true; }
+  bool ResponseTimeoutEnabled() const MOZ_OVERRIDE MOZ_FINAL {return true; }
+  PRIntervalTime ResponseTimeout() MOZ_OVERRIDE MOZ_FINAL
+  {
+    return PR_SecondsToInterval(15);
+  }
+
+private:
+
+  nsresult mStatus;
+  uint32_t mCaps;
+  // mCapsToClear holds flags that should be cleared in mCaps, e.g. unset
+  // NS_HTTP_REFRESH_DNS when DNS refresh request has completed to avoid
+  // redundant requests on the network. To deal with raciness, only unsetting
+  // bitfields should be allowed: 'lost races' will thus err on the
+  // conservative side, e.g. by going ahead with a 2nd DNS refresh.
+  uint32_t mCapsToClear;
+  nsRefPtr<nsAHttpConnection> mConnection;
+  nsCOMPtr<nsIInterfaceRequestor> mCallbacks;
+  nsRefPtr<nsHttpConnectionInfo> mConnectionInfo;
+  nsHttpRequestHead *mRequestHead;
+  bool mIsDone;
+};
+
+}} // namespace mozilla::net
+
+#endif // mozilla_net_NullHttpTransaction_h