diff -r 000000000000 -r 6474c204b198 dom/quota/OriginOrPatternString.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/quota/OriginOrPatternString.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,73 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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/. */
+
+#ifndef mozilla_dom_quota_originorpatternstring_h__
+#define mozilla_dom_quota_originorpatternstring_h__
+
+#include "mozilla/dom/quota/QuotaCommon.h"
+
+BEGIN_QUOTA_NAMESPACE
+
+class OriginOrPatternString : public nsCString
+{
+public:
+  static OriginOrPatternString
+  FromOrigin(const nsACString& aOrigin)
+  {
+    return OriginOrPatternString(aOrigin, true);
+  }
+
+  static OriginOrPatternString
+  FromPattern(const nsACString& aPattern)
+  {
+    return OriginOrPatternString(aPattern, false);
+  }
+
+  static OriginOrPatternString
+  FromNull()
+  {
+    return OriginOrPatternString();
+  }
+
+  bool
+  IsOrigin() const
+  {
+    return mIsOrigin;
+  }
+
+  bool
+  IsPattern() const
+  {
+    return mIsPattern;
+  }
+
+  bool
+  IsNull() const
+  {
+    return mIsNull;
+  }
+
+private:
+  OriginOrPatternString(const nsACString& aOriginOrPattern, bool aIsOrigin)
+  : nsCString(aOriginOrPattern),
+    mIsOrigin(aIsOrigin), mIsPattern(!aIsOrigin), mIsNull(false)
+  { }
+
+  OriginOrPatternString()
+  : mIsOrigin(false), mIsPattern(false), mIsNull(true)
+  { }
+
+  bool
+  operator==(const OriginOrPatternString& aOther) MOZ_DELETE;
+
+  bool mIsOrigin;
+  bool mIsPattern;
+  bool mIsNull;
+};
+
+END_QUOTA_NAMESPACE
+
+#endif // mozilla_dom_quota_originorpatternstring_h__