Implement DOMPoint of geometry interfaces.

Source/core/dom/DOMPoint.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/DOMPoint.h"
+
+namespace WebCore {
+
+DOMPoint* DOMPoint::create(const Dictionary& point)
+{
+    double x = 0;
+    double y = 0;
+    double z = 0;
+    double w = 0;
+
+    if (!DictionaryHelper::get(point, "x", x))
+        x = 0;
+    if (!DictionaryHelper::get(point, "y", y))
+        y = 0;
+    if (!DictionaryHelper::get(point, "z", z))
+        z = 0;
+    if (!DictionaryHelper::get(point, "w", w))
+        w = 1;
+
+    return new DOMPoint(x, y, z, w);
+}
+
+DOMPoint* DOMPoint::create(double x, double y, double z, double w)
+{
+    return new DOMPoint(x, y, z, w);
+}
+
+DOMPoint::DOMPoint(double x, double y, double z, double w)
+    : DOMPointReadOnly(x, y, z, w)
+{
+}
+
+} // namespace WebCore