Add [CEReactions] IDL attributes for Custom Elements V1

third_party/WebKit/Source/core/dom/custom/CustomElement.h

 // 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.
 
 #ifndef CustomElement_h
 #define CustomElement_h
 
 #include "core/CoreExport.h"
 #include "core/HTMLNames.h"
 #include "core/dom/Element.h"
 #include "wtf/Allocator.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
 class Document;
+class Element;
 class HTMLElement;
 class QualifiedName;
+class CustomElementDefinition;
 class CustomElementRegistry;
 
 class CORE_EXPORT CustomElement {
     STATIC_ONLY(CustomElement);
 public:
     // Retrieves the CustomElementsRegistry for Element, if any. This
     // may be a different object for a given element over its lifetime
     // as it moves between documents.
     static CustomElementsRegistry* registry(const Element&);
 
@@ skipping 17 matching lines @@
             && element.namespaceURI() == HTMLNames::xhtmlNamespaceURI;
     }
 
     static bool isValidName(const AtomicString& name);
 
     static bool shouldCreateCustomElement(Document&, const AtomicString& localName);
     static bool shouldCreateCustomElement(Document&, const QualifiedName&);
 
     static HTMLElement* createCustomElement(Document&, const AtomicString& localName, CreateElementFlags);
     static HTMLElement* createCustomElement(Document&, const QualifiedName&, CreateElementFlags);
+
+    static void enqueueUpgradeReaction(Element*, CustomElementDefinition*);
 };
 
 } // namespace blink
 
 #endif // CustomElement_h