diff -r 000000000000 -r 6474c204b198 editor/libeditor/base/nsStyleSheetTxns.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/editor/libeditor/base/nsStyleSheetTxns.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,69 @@
+/* -*- 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 nsStylesheetTxns_h__
+#define nsStylesheetTxns_h__
+
+#include "EditTxn.h"                    // for EditTxn, NS_DECL_EDITTXN
+#include "nsAutoPtr.h"                  // for nsRefPtr
+#include "nsCSSStyleSheet.h"            // for nsCSSStyleSheet
+#include "nsCycleCollectionParticipant.h"
+#include "nsID.h"                       // for REFNSIID
+#include "nsISupportsImpl.h"            // for nsCSSStyleSheet::Release
+#include "nscore.h"                     // for NS_IMETHOD
+
+class nsIEditor;
+
+class AddStyleSheetTxn : public EditTxn
+{
+public:
+  /** Initialize the transaction.
+    * @param aEditor the object providing core editing operations
+    * @param aSheet   the stylesheet to add
+    */
+  NS_IMETHOD Init(nsIEditor         *aEditor,
+                  nsCSSStyleSheet   *aSheet);
+
+  AddStyleSheetTxn();
+
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AddStyleSheetTxn, EditTxn)
+  NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
+
+  NS_DECL_EDITTXN
+
+protected:
+
+  nsIEditor*  mEditor;                  // the editor that created this transaction
+  nsRefPtr<nsCSSStyleSheet>  mSheet;    // the style sheet to add
+
+};
+
+
+class RemoveStyleSheetTxn : public EditTxn
+{
+public:
+  /** Initialize the transaction.
+    * @param aEditor the object providing core editing operations
+    * @param aSheet   the stylesheet to remove
+    */
+  NS_IMETHOD Init(nsIEditor         *aEditor,
+                  nsCSSStyleSheet   *aSheet);
+
+  RemoveStyleSheetTxn();
+
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(RemoveStyleSheetTxn, EditTxn)
+  NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
+
+  NS_DECL_EDITTXN
+
+protected:
+
+  nsIEditor*  mEditor;                  // the editor that created this transaction
+  nsRefPtr<nsCSSStyleSheet>  mSheet;    // the style sheet to remove
+
+};
+
+
+#endif /* nsStylesheetTxns_h__ */