diff -r 000000000000 -r 6474c204b198 docshell/shistory/src/nsSHTransaction.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docshell/shistory/src/nsSHTransaction.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,121 @@
+/* -*- Mode: C++; tab-width: 4; 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/. */
+
+// Local Includes
+#include "nsSHTransaction.h"
+#include "nsISHEntry.h"
+
+//*****************************************************************************
+//***    nsSHTransaction: Object Management
+//*****************************************************************************
+
+nsSHTransaction::nsSHTransaction() : mPersist(true), mPrev(nullptr) 
+{
+}
+
+
+nsSHTransaction::~nsSHTransaction()
+{
+}
+
+//*****************************************************************************
+//    nsSHTransaction: nsISupports
+//*****************************************************************************
+
+NS_IMPL_ADDREF(nsSHTransaction)
+NS_IMPL_RELEASE(nsSHTransaction)
+
+NS_INTERFACE_MAP_BEGIN(nsSHTransaction)
+   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsISHTransaction)
+   NS_INTERFACE_MAP_ENTRY(nsISHTransaction)
+NS_INTERFACE_MAP_END
+
+//*****************************************************************************
+//    nsSHTransaction: nsISHTransaction
+//*****************************************************************************
+
+NS_IMETHODIMP
+nsSHTransaction::Create(nsISHEntry* aSHEntry, nsISHTransaction* aPrev)
+{
+   SetSHEntry(aSHEntry);
+	if(aPrev)
+      aPrev->SetNext(this);
+
+   SetPrev(aPrev);
+	return NS_OK;
+}
+
+NS_IMETHODIMP
+nsSHTransaction::GetSHEntry(nsISHEntry ** aResult)
+{
+   NS_ENSURE_ARG_POINTER(aResult);
+	*aResult = mSHEntry;
+	NS_IF_ADDREF(*aResult);
+	return NS_OK;
+}
+
+
+NS_IMETHODIMP
+nsSHTransaction::SetSHEntry(nsISHEntry * aSHEntry)
+{
+	mSHEntry = aSHEntry;
+	return NS_OK;
+}
+
+
+NS_IMETHODIMP
+nsSHTransaction::GetNext(nsISHTransaction * * aResult)
+{
+   NS_ENSURE_ARG_POINTER(aResult);
+   *aResult = mNext;
+   NS_IF_ADDREF(*aResult);
+   return NS_OK;
+}
+
+
+NS_IMETHODIMP
+nsSHTransaction::SetNext(nsISHTransaction * aNext)
+{
+  if (aNext) {
+    NS_ENSURE_SUCCESS(aNext->SetPrev(this), NS_ERROR_FAILURE);
+  }
+
+  mNext = aNext;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsSHTransaction::SetPrev(nsISHTransaction * aPrev)
+{
+	/* This is weak reference to parent. Do not Addref it */
+     mPrev = aPrev;
+	 return NS_OK;
+}
+
+nsresult
+nsSHTransaction::GetPrev(nsISHTransaction ** aResult)
+{
+   NS_ENSURE_ARG_POINTER(aResult);
+   *aResult  = mPrev;
+   NS_IF_ADDREF(*aResult);
+   return NS_OK;
+}
+
+NS_IMETHODIMP
+nsSHTransaction::SetPersist(bool aPersist)
+{
+   mPersist = aPersist;
+   return NS_OK;
+}
+
+NS_IMETHODIMP
+nsSHTransaction::GetPersist(bool* aPersist)
+{
+   NS_ENSURE_ARG_POINTER(aPersist);
+
+   *aPersist = mPersist;
+   return NS_OK;
+}