Implement URLSearchParams.

Source/core/dom/URLSearchParams.idl

+/*
+ * Copyright (c) 2014, Opera Software ASA. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
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+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+[
+    Constructor(),
+    Constructor(DOMString queryString),
+    Constructor(URLSearchParams initial),
+    ImplementedAs=DOMURLSearchParams,
+    Custom=VisitDOMWrapper
+] interface URLSearchParams {
+    [NotEnumerable] DOMString toString();
+
+    [ImplementedAs=appendNameValue] void append(DOMString name, DOMString value);

[arv (Not doing code reviews), 2014/01/21 14:40:33]

Why all the renames? I think it is cleaner to just keep the same names as the
spec uses. It is less mental overhead to have to translate between the two.

+    [ImplementedAs=deleteAllWithName]void delete(DOMString name);

[Inactive, 2014/01/21 15:25:58]

nit: missing space before 'void'.

+    [ImplementedAs=getFirstValue, TreatReturnedNullStringAs=Null] DOMString get(DOMString name);
+    [ImplementedAs=getAllValues] sequence<DOMString> getAll(DOMString name);
+    [ImplementedAs=hasName] boolean has(DOMString name);
+    [ImplementedAs=setNameValue]void set(DOMString name, DOMString value);

[Inactive, 2014/01/21 15:25:58]

Ditto.

+};