diff -r 000000000000 -r 6474c204b198 layout/style/ImportRule.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/style/ImportRule.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,70 @@
+/* -*- 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/. */
+
+/* class for CSS @import rules */
+
+#ifndef mozilla_css_ImportRule_h__
+#define mozilla_css_ImportRule_h__
+
+#include "mozilla/Attributes.h"
+
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/css/Rule.h"
+#include "nsIDOMCSSImportRule.h"
+#include "nsCSSRules.h"
+
+class nsMediaList;
+class nsString;
+
+namespace mozilla {
+namespace css {
+
+class ImportRule MOZ_FINAL : public Rule,
+                             public nsIDOMCSSImportRule
+{
+public:
+  ImportRule(nsMediaList* aMedia, const nsString& aURLSpec);
+private:
+  // for |Clone|
+  ImportRule(const ImportRule& aCopy);
+  ~ImportRule();
+public:
+  NS_DECL_ISUPPORTS
+
+  DECL_STYLE_RULE_INHERIT
+
+#ifdef HAVE_CPP_AMBIGUITY_RESOLVING_USING
+  using Rule::GetStyleSheet; // unhide since nsIDOMCSSImportRule has its own GetStyleSheet
+#endif
+
+  // nsIStyleRule methods
+#ifdef DEBUG
+  virtual void List(FILE* out = stdout, int32_t aIndent = 0) const MOZ_OVERRIDE;
+#endif
+
+  // Rule methods
+  virtual int32_t GetType() const;
+  virtual already_AddRefed<Rule> Clone() const;
+
+  void SetSheet(nsCSSStyleSheet*);
+
+  virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
+
+  // nsIDOMCSSRule interface
+  NS_DECL_NSIDOMCSSRULE
+
+  // nsIDOMCSSImportRule interface
+  NS_DECL_NSIDOMCSSIMPORTRULE
+
+private:
+  nsString  mURLSpec;
+  nsRefPtr<nsMediaList> mMedia;
+  nsRefPtr<nsCSSStyleSheet> mChildSheet;
+};
+
+} // namespace css
+} // namespace mozilla
+
+#endif /* mozilla_css_ImportRule_h__ */