Implement "create an element" when sync for Custom Element V1

third_party/WebKit/Source/bindings/core/v8/ScriptCustomElementDefinition.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 ScriptCustomElementDefinition_h
 #define ScriptCustomElementDefinition_h
 
 #include "bindings/core/v8/ScopedPersistent.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "core/CoreExport.h"
@@ skipping 28 matching lines @@
         const v8::Local<v8::Object>& connectedCallback,
         const v8::Local<v8::Object>& disconnectedCallback,
         const v8::Local<v8::Object>& attributeChangedCallback,
         const HashSet<AtomicString>& observedAttributes);
 
     virtual ~ScriptCustomElementDefinition() = default;
 
     v8::Local<v8::Object> constructor() const;
     v8::Local<v8::Object> prototype() const;
 
+    HTMLElement* createElementSync(Document&, const QualifiedName&) override;
+    HTMLElement* createElementSync(Document&, const QualifiedName&, ExceptionState&) override;
+
 private:
     ScriptCustomElementDefinition(
         ScriptState*,
         const CustomElementDescriptor&,
         const v8::Local<v8::Object>& constructor,
         const v8::Local<v8::Object>& prototype,
         const v8::Local<v8::Object>& connectedCallback,
         const v8::Local<v8::Object>& disconnectedCallback,
         const v8::Local<v8::Object>& attributeChangedCallback,
         const HashSet<AtomicString>& observedAttributes);
 
     // Implementations of |CustomElementDefinition|
     ScriptValue getConstructorForScript() final;
     bool runConstructor(Element*) override;
+    Element* runConstructor();
 
     RefPtr<ScriptState> m_scriptState;
     ScopedPersistent<v8::Object> m_constructor;
     ScopedPersistent<v8::Object> m_prototype;
     ScopedPersistent<v8::Object> m_connectedCallback;
     ScopedPersistent<v8::Object> m_disconnectedCallback;
     ScopedPersistent<v8::Object> m_attributeChangedCallback;
     HashSet<AtomicString> m_observedAttributes;
 };
 
 } // namespace blink
 
 #endif // ScriptCustomElementDefinition_h