Bug 1425769 - Base class for ShadowRoot and Document to manage style state

Tag #1375

dom/base/StyleScope.cpp

@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "StyleScope.h"
+#include "mozilla/dom/StyleSheetList.h"
+
+namespace mozilla {
+namespace dom {
+
+StyleScope::~StyleScope()
+{
+}
+
+StyleSheetList&
+StyleScope::EnsureDOMStyleSheets()
+{
+  if (!mDOMStyleSheets) {
+    mDOMStyleSheets = new StyleSheetList(*this);
+  }
+  return *mDOMStyleSheets;
+}
+
+}
+}