Implement the script parts of custom element upgrade steps.

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"
 #include "core/dom/custom/CustomElementDefinition.h"
 #include "v8.h"
 #include "wtf/Noncopyable.h"
+#include "wtf/RefPtr.h"
 
 namespace blink {
 
 class CustomElementDescriptor;
 class CustomElementsRegistry;
-class ScriptState;
 
 class CORE_EXPORT ScriptCustomElementDefinition final :
     public CustomElementDefinition {
     WTF_MAKE_NONCOPYABLE(ScriptCustomElementDefinition);
 public:
     static ScriptCustomElementDefinition* forConstructor(
         ScriptState*,
         CustomElementsRegistry*,
         const v8::Local<v8::Value>& constructor);
 
@@ skipping 11 matching lines @@
 
 private:
     ScriptCustomElementDefinition(
         ScriptState*,
         const CustomElementDescriptor&,
         const v8::Local<v8::Object>& constructor,
         const v8::Local<v8::Object>& prototype);
 
     // Implementations of |CustomElementDefinition|
     ScriptValue getConstructorForScript() final;
+    bool runConstructor(Element*) override;
 
     RefPtr<ScriptState> m_scriptState;
     ScopedPersistent<v8::Object> m_constructor;
     ScopedPersistent<v8::Object> m_prototype;
 };
 
 } // namespace blink
 
 #endif // ScriptCustomElementDefinition_h