Simplify and unify PolymorphicStoreNameFeild

src/apinatives.js

 // Copyright 2006-2008 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 24 matching lines @@
   date.setTime(time);
   return date;
 }
 
 
 var kApiFunctionCache = new InternalArray();
 var functionCache = kApiFunctionCache;
 
 
 function Instantiate(data, name) {
+            %DebugBreak();
   if (!%IsTemplate(data)) return data;
   var tag = %GetTemplateField(data, kApiTagOffset);
   switch (tag) {
     case kFunctionTag:
       return InstantiateFunction(data, name);
     case kNewObjectTag:
       var Constructor = %GetTemplateField(data, kApiConstructorOffset);
       // Note: Do not directly use a function template as a condition, our
       // internal ToBoolean doesn't handle that!
       var result = typeof Constructor === 'undefined' ?
@@ skipping 17 matching lines @@
   if (!isFunctionCached) {
     try {
       cache[serialNumber] = null;
       var fun = %CreateApiFunction(data);
       if (name) %FunctionSetName(fun, name);
       cache[serialNumber] = fun;
       var prototype = %GetTemplateField(data, kApiPrototypeTemplateOffset);
       var flags = %GetTemplateField(data, kApiFlagOffset);
       // Note: Do not directly use an object template as a condition, our
       // internal ToBoolean doesn't handle that!
+            %DebugBreak();
       fun.prototype = typeof prototype === 'undefined' ?
           {} : Instantiate(prototype);
       if (flags & (1 << kReadOnlyPrototypeBit)) {
         %FunctionSetReadOnlyPrototype(fun);
       }
       %SetProperty(fun.prototype, "constructor", fun, DONT_ENUM);
       var parent = %GetTemplateField(data, kApiParentTemplateOffset);
       // Note: Do not directly use a function template as a condition, our
       // internal ToBoolean doesn't handle that!
       if (!(typeof parent === 'undefined')) {
@@ skipping 21 matching lines @@
         var prop_data = properties[i + 2];
         var attributes = properties[i + 3];
         var value = Instantiate(prop_data, name);
         %SetProperty(obj, name, value, attributes);
       }
     } finally {
       if (requires_access_checks) %EnableAccessChecks(obj);
     }
   }
 }