Make integer indexed properties ("elements") work for proxies.

src/factory.h

 // Copyright 2011 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 331 matching lines @@
   Handle<JSFunction> NewFunctionWithoutPrototype(Handle<String> name,
                                                  Handle<Code> code);
 
   Handle<DescriptorArray> CopyAppendForeignDescriptor(
       Handle<DescriptorArray> array,
       Handle<String> key,
       Handle<Object> value,
       PropertyAttributes attributes);
 
   Handle<String> NumberToString(Handle<Object> number);
+  Handle<String> Uint32ToString(uint32_t value);
 
   enum ApiInstanceType {
     JavaScriptObject,
     InnerGlobalObject,
     OuterGlobalObject
   };
 
   Handle<JSFunction> CreateApiFunction(
       Handle<FunctionTemplateInfo> data,
       ApiInstanceType type = JavaScriptObject);
@@ skipping 93 matching lines @@
   // Update the map cache in the global context with (keys, map)
   Handle<MapCache> AddToMapCache(Handle<Context> context,
                                  Handle<FixedArray> keys,
                                  Handle<Map> map);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FACTORY_H_