Implement custom element construction and some 'define' checks

third_party/WebKit/Source/bindings/core/v8/custom/V8CustomElementsRegistryCustom.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 "bindings/core/v8/V8CustomElementsRegistry.h"
+
+#include "core/dom/custom/CustomElementsRegistry.h"
+#include "v8.h"
+
+namespace blink {
+
+void V8CustomElementsRegistry::visitDOMWrapper(
+    v8::Isolate* isolate,
+    ScriptWrappable* wrappable,
+    const v8::Persistent<v8::Object>& wrapper)
+{
+    CustomElementsRegistry* registry =
+        wrappable->toImpl<CustomElementsRegistry>();
+    registry->setWrapperReferences(isolate, wrapper);
+}
+
+} // namespace blink