Implement custom element construction and some 'define' checks

third_party/WebKit/Source/core/dom/custom/CustomElementDefinition.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/custom/CustomElementDefinition.h"
+
+namespace blink {
+
+CustomElementDefinition::CustomElementDefinition(
+    CustomElementsRegistry* registry,
+    CustomElementsRegistry::Id id,
+    const AtomicString& localName)
+    : m_registry(registry)
+    , m_id(id)
+    , m_localName(localName)
+{
+}
+
+v8::Local<v8::Object> CustomElementDefinition::prototype(
+    ScriptState* scriptState) const
+{
+    return m_registry->prototype(scriptState, *this);
+}
+
+} // namespace blink