Implement 'URLSearchParams'

third_party/WebKit/Source/core/dom/URLSearchParams.idl

Index: third_party/WebKit/Source/core/dom/URLSearchParams.idl
diff --git a/third_party/WebKit/Source/core/dom/URLSearchParams.idl b/third_party/WebKit/Source/core/dom/URLSearchParams.idl
new file mode 100644
index 0000000000000000000000000000000000000000..0dd6b68b859fbaeeef3b19deb5d565768c2c2322
--- /dev/null
+++ b/third_party/WebKit/Source/core/dom/URLSearchParams.idl
@@ -0,0 +1,22 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// https://url.spec.whatwg.org/#interface-urlsearchparams
+
+[
+    Constructor(),
+    Constructor(URLSearchParams initial),
+    Constructor(USVString queryString),
+    GarbageCollected,
+    Exposed=(Window,Worker)
+] interface URLSearchParams {
+    void append(USVString name, USVString value);
+    [ImplementedAs=deleteAllWithName] void delete(USVString name);
+    [TreatReturnedNullStringAs=Null] USVString get(USVString name);
+    sequence<USVString> getAll(USVString name);
+    boolean has(USVString name);
+    void set(USVString name, USVString value);
+
+    stringifier;
+};