Implement DOMRect of geometry interfaces.

Source/core/dom/DOMRect.cpp

+// 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.
+
+#include "config.h"
+#include "core/dom/DOMRect.h"
+
+namespace WebCore {
+
+DOMRect* DOMRect::create(double x, double y, double width, double height)
+{
+    return new DOMRect(x, y, width, height);
+}
+
+DOMRect::DOMRect(double x, double y, double width, double height)
+    : DOMRectReadOnly(x, y, width, height)
+{
+}
+
+} // namespace WebCore