[GeometryInterface] add toJSON() function in DOMQuad

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 "bindings/core/v8/V8ObjectBuilder.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)) {}
 
+ScriptValue DOMQuad::toJSONForBinding(ScriptState* scriptState) const {
+  V8ObjectBuilder result(scriptState);
+  result.add("p1", p1());
+  result.add("p2", p2());
+  result.add("p3", p3());
+  result.add("p4", p4());
+  return result.scriptValue();
+}
+
 }  // namespace blink