Implement DOMPoint of geometry interfaces.

Source/core/dom/DOMPointReadOnly.cpp

Index: Source/core/dom/DOMPointReadOnly.cpp
diff --git a/Source/core/dom/DOMPointReadOnly.cpp b/Source/core/dom/DOMPointReadOnly.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..7539584d6bbfacfc74a503d2bdb88fa34a4438b7
--- /dev/null
+++ b/Source/core/dom/DOMPointReadOnly.cpp
@@ -0,0 +1,18 @@
+// 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/DOMPointReadOnly.h"
+
+namespace WebCore {
+
+DOMPointReadOnly::DOMPointReadOnly(double x, double y, double z, double w)
+    : m_x(x)
+    , m_y(y)
+    , m_z(z)
+    , m_w(w)
+{
+}
+
+} // namespace WebCore