Implement callback reactions for Custom Elements V1

third_party/WebKit/Source/core/dom/custom/CustomElementAttributeChangedCallbackReaction.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/CustomElementAttributeChangedCallbackReaction.h"
+
+#include "core/dom/custom/CustomElementDefinition.h"
+
+namespace blink {
+
+CustomElementAttributeChangedCallbackReaction::CustomElementAttributeChangedCallbackReaction(
+    CustomElementDefinition* definition,
+    const QualifiedName& name,
+    const AtomicString& oldValue, const AtomicString& newValue)
+    : CustomElementReaction(definition)
+    , m_name(name)
+    , m_oldValue(oldValue)
+    , m_newValue(newValue)
+{
+    DCHECK(definition->hasAttributeChangedCallback(name));
+}
+
+void CustomElementAttributeChangedCallbackReaction::invoke(Element* element)
+{
+    m_definition->runAttributeChangedCallback(element, m_name, m_oldValue, m_newValue);
+}
+
+} // namespace blink