Fixing custom element type extensions to have correct native type

Source/bindings/dart/DartCustomElementBinding.cpp

Index: Source/bindings/dart/DartCustomElementBinding.cpp
diff --git a/Source/bindings/dart/DartCustomElementBinding.cpp b/Source/bindings/dart/DartCustomElementBinding.cpp
index abe0696acc348c2c2c64595f4a3ca95580e96b74..1297d6df674de002012346a0c1e1026a36dbfab8 100644
--- a/Source/bindings/dart/DartCustomElementBinding.cpp
+++ b/Source/bindings/dart/DartCustomElementBinding.cpp
@@ -33,13 +33,14 @@
 
 namespace WebCore {
 
-PassOwnPtr<DartCustomElementBinding> DartCustomElementBinding::create(Dart_Handle customType)
+PassOwnPtr<DartCustomElementBinding> DartCustomElementBinding::create(Dart_Handle customType, intptr_t nativeClassId)
 {
-    return adoptPtr(new DartCustomElementBinding(customType));
+    return adoptPtr(new DartCustomElementBinding(customType, nativeClassId));
 }
 
-DartCustomElementBinding::DartCustomElementBinding(Dart_Handle customType)
+DartCustomElementBinding::DartCustomElementBinding(Dart_Handle customType, intptr_t nativeClassId)
     : m_customType(Dart_NewPersistentHandle(customType))
+    , m_nativeClassId(nativeClassId)
 {
 }