Simplify Custom Element constructors to be functions, not wrappers

Source/bindings/v8/CustomElementHelpers.h

Index: Source/bindings/v8/CustomElementHelpers.h
diff --git a/Source/bindings/v8/CustomElementHelpers.h b/Source/bindings/v8/CustomElementHelpers.h
index dcd79e84f5ca78394ef8cbbcab7f57a4dcd7cf6f..dbcb64095de6bed571b696acd96392cfccb4f586 100644
--- a/Source/bindings/v8/CustomElementHelpers.h
+++ b/Source/bindings/v8/CustomElementHelpers.h
@@ -32,6 +32,7 @@
 #define CustomElementHelpers_h
 
 #include "bindings/v8/DOMDataStore.h"
+#include "bindings/v8/ScriptState.h"
 #include "bindings/v8/ScriptValue.h"
 #include "core/dom/CustomElementDefinition.h"
 #include "core/dom/CustomElementRegistry.h"
@@ -39,11 +40,12 @@
 #include "wtf/Forward.h"
 #include "wtf/HashSet.h"
 #include "wtf/PassRefPtr.h"
+#include "wtf/text/AtomicString.h"
 
 namespace WebCore {
 
-class CustomElementConstructor;
 class CustomElementInvocation;
+class Document;
 class HTMLElement;
 class QualifiedName;
 class SVGElement;
@@ -51,7 +53,8 @@ class ScriptState;
 
 class CustomElementHelpers {
 public:
-    static bool initializeConstructorWrapper(CustomElementConstructor*, const ScriptValue& prototype, ScriptState*);
+    static ScriptValue createConstructor(ScriptState*, const ScriptValue& prototype, Document*, const AtomicString& namespaceURI, const AtomicString& name, const AtomicString& type);
+
     static bool isValidPrototypeParameter(const ScriptValue&, ScriptState*, AtomicString& namespaceURI);
     static bool isValidPrototypeParameter(const ScriptValue&, ScriptState*);
     static bool isFeatureAllowed(ScriptState*);