diff -r 000000000000 -r 6474c204b198 layout/style/NameSpaceRule.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/style/NameSpaceRule.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,72 @@
+/* -*- 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 @namespace rules */
+
+#ifndef mozilla_css_NameSpaceRule_h__
+#define mozilla_css_NameSpaceRule_h__
+
+#include "mozilla/Attributes.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/css/Rule.h"
+
+#include "nsIDOMCSSRule.h"
+
+class nsIAtom;
+
+// IID for the NameSpaceRule class {f0b0dbe1-5031-4a21-b06a-dc141ef2af98}
+#define NS_CSS_NAMESPACE_RULE_IMPL_CID     \
+{0xf0b0dbe1, 0x5031, 0x4a21, {0xb0, 0x6a, 0xdc, 0x14, 0x1e, 0xf2, 0xaf, 0x98}}
+
+
+namespace mozilla {
+namespace css {
+
+class NameSpaceRule MOZ_FINAL : public Rule,
+                                public nsIDOMCSSRule
+{
+public:
+  NameSpaceRule(nsIAtom* aPrefix, const nsString& aURLSpec);
+private:
+  // for |Clone|
+  NameSpaceRule(const NameSpaceRule& aCopy);
+  ~NameSpaceRule();
+public:
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_CSS_NAMESPACE_RULE_IMPL_CID)
+
+  NS_DECL_ISUPPORTS
+
+  DECL_STYLE_RULE_INHERIT
+
+  // 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;
+
+  nsIAtom* GetPrefix() const { return mPrefix; }
+
+  void GetURLSpec(nsString& aURLSpec) const { aURLSpec = mURLSpec; }
+
+  virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
+    MOZ_MUST_OVERRIDE;
+
+  // nsIDOMCSSRule interface
+  NS_DECL_NSIDOMCSSRULE
+
+private:
+  nsCOMPtr<nsIAtom> mPrefix;
+  nsString          mURLSpec;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(NameSpaceRule, NS_CSS_NAMESPACE_RULE_IMPL_CID)
+
+} // namespace css
+} // namespace mozilla
+
+#endif /* mozilla_css_NameSpaceRule_h__ */