diff -r 000000000000 -r 6474c204b198 dom/base/URLSearchParams.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/base/URLSearchParams.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,105 @@
+/* -*- 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 mozilla_dom_URLSearchParams_h
+#define mozilla_dom_URLSearchParams_h
+
+#include "mozilla/dom/BindingDeclarations.h"
+#include "mozilla/ErrorResult.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsWrapperCache.h"
+#include "nsClassHashtable.h"
+#include "nsHashKeys.h"
+#include "nsISupports.h"
+
+namespace mozilla {
+namespace dom {
+
+class URLSearchParamsObserver : public nsISupports
+{
+public:
+  virtual ~URLSearchParamsObserver() {}
+
+  virtual void URLSearchParamsUpdated() = 0;
+};
+
+class URLSearchParams MOZ_FINAL : public nsISupports,
+                                  public nsWrapperCache
+{
+public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(URLSearchParams)
+
+  URLSearchParams();
+  ~URLSearchParams();
+
+  // WebIDL methods
+  nsISupports* GetParentObject() const
+  {
+    return nullptr;
+  }
+
+  virtual JSObject*
+  WrapObject(JSContext* aCx) MOZ_OVERRIDE;
+
+  static already_AddRefed<URLSearchParams>
+  Constructor(const GlobalObject& aGlobal, const nsAString& aInit,
+              ErrorResult& aRv);
+
+  static already_AddRefed<URLSearchParams>
+  Constructor(const GlobalObject& aGlobal, URLSearchParams& aInit,
+              ErrorResult& aRv);
+
+  void ParseInput(const nsACString& aInput,
+                  URLSearchParamsObserver* aObserver);
+
+  void AddObserver(URLSearchParamsObserver* aObserver);
+  void RemoveObserver(URLSearchParamsObserver* aObserver);
+
+  void Serialize(nsAString& aValue) const;
+
+  void Get(const nsAString& aName, nsString& aRetval);
+
+  void GetAll(const nsAString& aName, nsTArray<nsString >& aRetval);
+
+  void Set(const nsAString& aName, const nsAString& aValue);
+
+  void Append(const nsAString& aName, const nsAString& aValue);
+
+  bool Has(const nsAString& aName);
+
+  void Delete(const nsAString& aName);
+
+  void Stringify(nsString& aRetval)
+  {
+    Serialize(aRetval);
+  }
+
+private:
+  void AppendInternal(const nsAString& aName, const nsAString& aValue);
+
+  void DeleteAll();
+
+  void DecodeString(const nsACString& aInput, nsACString& aOutput);
+
+  void NotifyObservers(URLSearchParamsObserver* aExceptObserver);
+
+  static PLDHashOperator
+  CopyEnumerator(const nsAString& aName, nsTArray<nsString>* aArray,
+                 void *userData);
+
+  static PLDHashOperator
+  SerializeEnumerator(const nsAString& aName, nsTArray<nsString>* aArray,
+                      void *userData);
+
+  nsClassHashtable<nsStringHashKey, nsTArray<nsString>> mSearchParams;
+
+  nsTArray<nsRefPtr<URLSearchParamsObserver>> mObservers;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif /* mozilla_dom_URLSearchParams_h */