[GeometryInterface] Implement DOMQuad and DOMQuadInit.

third_party/WebKit/Source/core/dom/DOMQuad.cpp

+// Copyright 2016 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 "core/dom/DOMQuad.h"
+
+#include "core/dom/DOMPoint.h"
+
+namespace blink {
+
+DOMQuad* DOMQuad::create(const DOMPointInit& p1,
+                         const DOMPointInit& p2,
+                         const DOMPointInit& p3,
+                         const DOMPointInit& p4) {
+  return new DOMQuad(p1, p2, p3, p4);
+}
+
+DOMQuad::DOMQuad(const DOMPointInit& p1,
+                 const DOMPointInit& p2,
+                 const DOMPointInit& p3,
+                 const DOMPointInit& p4)
+    : m_p1(DOMPoint::fromPoint(p1)),
+      m_p2(DOMPoint::fromPoint(p2)),
+      m_p3(DOMPoint::fromPoint(p3)),
+      m_p4(DOMPoint::fromPoint(p4)) {}
+
+}  // namespace blink