Implement URLSearchParams.

Source/core/dom/DOMURLSearchParams.h

Index: Source/core/dom/DOMURLSearchParams.h
diff --git a/Source/core/dom/DOMURLSearchParams.h b/Source/core/dom/DOMURLSearchParams.h
new file mode 100644
index 0000000000000000000000000000000000000000..173e78449cda3d7f61d0f3bb8b3f73922666ef52
--- /dev/null
+++ b/Source/core/dom/DOMURLSearchParams.h
@@ -0,0 +1,66 @@
+// Copyright 2014 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.
+
+#ifndef DOMURLSearchParams_h
+#define DOMURLSearchParams_h
+
+#include "bindings/v8/ScriptWrappable.h"
+#include "platform/heap/Handle.h"
+#include "wtf/Forward.h"
+#include "wtf/text/WTFString.h"
+#include <utility>
+
+namespace WebCore {
+
+class DOMURLUtils;
+class ExceptionState;
+
+class DOMURLSearchParams FINAL : public GarbageCollectedFinalized<DOMURLSearchParams>, public ScriptWrappable {
+public:
+    static DOMURLSearchParams* create(const String& queryString = String(), DOMURLUtils* urlObject = 0)
+    {
+        return new DOMURLSearchParams(queryString, urlObject);
+    }
+
+    static DOMURLSearchParams* create(DOMURLSearchParams* searchParams, DOMURLUtils* urlObject = 0)
+    {
+        return new DOMURLSearchParams(searchParams, urlObject);
+    }
+
+    virtual ~DOMURLSearchParams();
+
+    String toString() const;
+
+    void appendNameValue(const String& name, const String& value);
+    void deleteAllWithName(const String&);
+    String getFirstValue(const String&) const;
+
+    Vector<String> getAllValues(const String&) const;
+    bool hasName(const String&) const;
+    void setNameValue(const String& name, const String& value);
+
+    void setInput(const String&);
+
+    void dropURLObject(DOMURLUtils*);
+    void addURLObject(DOMURLUtils*);
+#if ASSERT_ENABLED
+    bool hasURLObject(DOMURLUtils*) const;
+#endif
+
+    void trace(Visitor*);
+
+private:
+    DOMURLSearchParams(const String&, DOMURLUtils*);
+    DOMURLSearchParams(DOMURLSearchParams*, DOMURLUtils*);
+
+    void runUpdateSteps();
+
+    Vector<std::pair<String, String> > m_params;
+    HeapVector<Member<DOMURLUtils> > m_urlObjects;
+    bool m_isUpdating;
+};
+
+} // namespace WebCore
+
+#endif // DOMURLSearchParams_h