diff -r 000000000000 -r 6474c204b198 ipc/glue/Transport_posix.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/glue/Transport_posix.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,72 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* 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/. */
+
+#include <unistd.h>
+
+#include <string>
+
+#include "chrome/common/child_process_info.h"
+
+#include "mozilla/ipc/Transport.h"
+#include "mozilla/ipc/FileDescriptor.h"
+
+using namespace base;
+using namespace std;
+
+namespace mozilla {
+namespace ipc {
+
+bool
+CreateTransport(ProcessHandle /*unused*/, ProcessHandle /*unused*/,
+                TransportDescriptor* aOne, TransportDescriptor* aTwo)
+{
+  // Gecko doesn't care about this random ID, and the argument to this
+  // function isn't really necessary, it can be just any random
+  // pointer value
+  wstring id = ChildProcessInfo::GenerateRandomChannelID(aOne);
+  // Use MODE_SERVER to force creation of the socketpair
+  Transport t(id, Transport::MODE_SERVER, nullptr);
+  int fd1 = t.GetFileDescriptor();
+  int fd2, dontcare;
+  t.GetClientFileDescriptorMapping(&fd2, &dontcare);
+  if (fd1 < 0 || fd2 < 0) {
+    return false;
+  }
+
+  // The Transport closes these fds when it goes out of scope, so we
+  // dup them here
+  fd1 = dup(fd1);
+  fd2 = dup(fd2);
+  if (fd1 < 0 || fd2 < 0) {
+    return false;
+  }
+
+  aOne->mFd = base::FileDescriptor(fd1, true/*close after sending*/);
+  aTwo->mFd = base::FileDescriptor(fd2, true/*close after sending*/);
+  return true;
+}
+
+Transport*
+OpenDescriptor(const TransportDescriptor& aTd, Transport::Mode aMode)
+{
+  return new Transport(aTd.mFd.fd, aMode, nullptr);
+}
+
+Transport*
+OpenDescriptor(const FileDescriptor& aFd, Transport::Mode aMode)
+{
+  return new Transport(aFd.PlatformHandle(), aMode, nullptr);
+}
+
+void
+CloseDescriptor(const TransportDescriptor& aTd)
+{
+  close(aTd.mFd.fd);
+}
+
+} // namespace ipc
+} // namespace mozilla