[WIP] Implement DOMPoint of geometry interface.

Source/core/dom/DOMPointReadOnly.h

+// 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 DOMPointReadOnly_h
+#define DOMPointReadOnly_h
+
+#include "platform/heap/Handle.h"
+#include "wtf/RefCounted.h"
+
+namespace WebCore {
+
+class DOMPointReadOnly : public GarbageCollected<DOMPointReadOnly> {
+public:
+    static DOMPointReadOnly* create()
+    {
+        return new DOMPointReadOnly();
+    }
+
+    virtual void trace(Visitor* v) { }
+
+protected:
+    DOMPointReadOnly() { }
+};
+
+} // namespace WebCore
+
+#endif