Implement callback reactions for Custom Elements V1

third_party/WebKit/Source/core/dom/custom/CustomElementAttributeChangedCallbackReaction.cpp

Index: third_party/WebKit/Source/core/dom/custom/CustomElementAttributeChangedCallbackReaction.cpp
diff --git a/third_party/WebKit/Source/core/dom/custom/CustomElementAttributeChangedCallbackReaction.cpp b/third_party/WebKit/Source/core/dom/custom/CustomElementAttributeChangedCallbackReaction.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..7b33177fc7ff0fb9d885d04b1adbd1db09402d6c
--- /dev/null
+++ b/third_party/WebKit/Source/core/dom/custom/CustomElementAttributeChangedCallbackReaction.cpp
@@ -0,0 +1,28 @@
+// 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