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(),

[philipj_slow, 2015/11/16 12:15:46]

Does the IDL compiler not support the [Constructor(optional (USVString or
URLSearchParams) init = "")] syntax from the spec? If not, can you make sure
there's an issue block crbug.com/345506?

[Mike West, 2015/11/16 14:12:10]

I didn't think it would work, but it looks like it might. Hooray!

+    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);

[philipj_slow, 2015/11/16 12:15:46]

Can you use `USVString?` instead of `[TreatReturnedNullStringAs=Null]
USVString`?

[Mike West, 2015/11/16 14:12:10]

Sure.

+    sequence<USVString> getAll(USVString name);
+    boolean has(USVString name);
+    void set(USVString name, USVString value);
+

[philipj_slow, 2015/11/16 12:15:46]

Can you add a TODO for `iterable<USVString, USVString>`, or implement if it's
not blocked on something?

[Mike West, 2015/11/16 14:12:10]

Sure. I even added a test!

+    stringifier;
+};