Fixing custom element type extensions to have correct native type

Source/bindings/dart/DartCustomElementWrapper.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 96 matching lines @@
         domData, DartHTMLElement::isNode, reinterpret_cast<HTMLElement*>(element));
     if (oldInstance) {
         DartDOMWrapper::disassociateWrapper<DartHTMLElement>(
             domData,
             reinterpret_cast<HTMLElement*>(element),
             Dart_HandleFromWeakPersistent(oldInstance));
     }
 
     Dart_Handle newInstance = Dart_Allocate(customType);
     ASSERT(!Dart_IsError(newInstance));
-    // TODO(14190): Use a more specific type instead of DartHTMLElement here.
-    DartDOMWrapper::writeNativePointer(newInstance, element, DartHTMLElement::dartClassId);
+    DartDOMWrapper::writeNativePointer(newInstance, element, binding->nativeClassId());
 
     Dart_Handle result = Dart_InvokeConstructor(newInstance, Dart_NewStringFromCString("created"), 0, 0);
 
     if (Dart_IsError(result)) {
         DartUtilities::reportProblem(domData->scriptExecutionContext(), result);
 
         // Fall back to the old wrapper if possible.
         if (oldInstance) {
             Dart_Handle oldWrapper = Dart_HandleFromWeakPersistent(oldInstance);
             DartDOMWrapper::associateWrapper<DartHTMLElement>(domData, element, oldWrapper);
             return oldWrapper;
         }
 
         // When the upgrade fails the failed wrapper may have been associated,
         // so we need to create a new one and re-associate it.
         Dart_Handle fallbackWrapper = createUpgradeCandidateWrapper(element, createSpecificWrapper);
 
         DartDOMWrapper::associateWrapper<DartHTMLElement>(domData, element, fallbackWrapper);
-        // TODO(14190): Use a more specific type instead of DartHTMLElement here.
-        DartDOMWrapper::writeNativePointer(fallbackWrapper, element, DartHTMLElement::dartClassId);
+        DartDOMWrapper::writeNativePointer(fallbackWrapper, element, binding->nativeClassId());
         return fallbackWrapper;
     }
     return newInstance;
 }
 
 template<>
 Dart_Handle DartCustomElementWrapper<SVGElement>::upgradeDartWrapper(SVGElement* element, Dart_Handle (*createSpecificWrapper)(SVGElement* element))
 {
     // TODO: support SVG elements.
     ASSERT(FALSE);
@@ skipping 16 matching lines @@
     DartDOMWrapper::associateWrapper<DartHTMLElement>(domData, element, wrapper);
 }
 
 template
 class DartCustomElementWrapper<HTMLElement>;
 
 template
 class DartCustomElementWrapper<SVGElement>;
 
 } // namespace WebCore