Introduce CustomElementRegistry#get() method

third_party/WebKit/Source/core/dom/custom/CustomElementDefinition.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 CustomElementDefinition_h
 #define CustomElementDefinition_h
 
+#include "bindings/core/v8/ScriptValue.h"
 #include "core/CoreExport.h"
 #include "core/dom/custom/CustomElementDescriptor.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 
+class ScriptState;
+
 class CORE_EXPORT CustomElementDefinition
     : public GarbageCollectedFinalized<CustomElementDefinition> {
     WTF_MAKE_NONCOPYABLE(CustomElementDefinition);
 public:
     CustomElementDefinition(const CustomElementDescriptor&);
     virtual ~CustomElementDefinition();
 
     const CustomElementDescriptor& descriptor() { return m_descriptor; }
 
+    // TODO(yosin): To support Web Module, once we introduce abstract class
+    // |CustomElementConstructor|, allows us to have JavaScript and C++
+    // constructor, and ask binding layer to convert |CustomElementConstructor|
+    // to |ScriptValue|, we should replace |getConstructorForScript()| by
+    // |getConstructor() -> CustomElementConstructor|.
+    virtual ScriptValue getConstructorForScript() = 0;
+
     DEFINE_INLINE_VIRTUAL_TRACE() { }
 
 private:
     const CustomElementDescriptor m_descriptor;
 };
 
 } // namespace blink
 
 #endif // CustomElementDefinition_h