Added GetTransaction() method.

editor/txmgr/src/nsTransactionItem.cpp

@@ -52,6 +52,17 @@ nsTransactionItem::AddChild(nsTransactionItem *aTransactionItem)
   return NS_OK;
 }
 
+nsresult
+nsTransactionItem::GetTransaction(nsITransaction **aTransaction)
+{
+  if (!aTransaction)
+    return NS_ERROR_NULL_POINTER;
+
+  *aTransaction = mTransaction;
+
+  return NS_OK;
+}
+
 nsresult
 nsTransactionItem::Do()
 {

editor/txmgr/src/nsTransactionItem.h

@@ -37,6 +37,7 @@ public:
   virtual ~nsTransactionItem();
 
   virtual nsresult AddChild(nsTransactionItem *aTransactionItem);
+  virtual nsresult GetTransaction(nsITransaction **aTransaction);
 
   virtual nsresult Do(void);
   virtual nsresult Undo(void);