Implement LookupIterator designed to replace LookupResult

src/json-stringifier.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_JSON_STRINGIFIER_H_
 #define V8_JSON_STRINGIFIER_H_
 
 #include "src/v8.h"
 #include "src/conversions.h"
 #include "src/utils.h"
@@ skipping 320 matching lines @@
 
 
 template <bool is_ascii, typename Char>
 void BasicJsonStringifier::Append_(const Char* chars) {
   for ( ; *chars != '\0'; chars++) Append_<is_ascii, Char>(*chars);
 }
 
 
 MaybeHandle<Object> BasicJsonStringifier::ApplyToJsonFunction(
     Handle<Object> object, Handle<Object> key) {
-  LookupResult lookup(isolate_);
-  JSObject::cast(*object)->LookupRealNamedProperty(tojson_string_, &lookup);
-  if (!lookup.IsProperty()) return object;
-  PropertyAttributes attr;
+  LookupIterator it(object, tojson_string_, LookupIterator::SKIP_INTERCEPTOR);
   Handle<Object> fun;
-  ASSIGN_RETURN_ON_EXCEPTION(
-      isolate_, fun,
-      Object::GetProperty(object, object, &lookup, tojson_string_, &attr),
-      Object);
+  ASSIGN_RETURN_ON_EXCEPTION(isolate_, fun, Object::GetProperty(&it), Object);
   if (!fun->IsJSFunction()) return object;
 
   // Call toJSON function.
   if (key->IsSmi()) key = factory_->NumberToString(key);
   Handle<Object> argv[] = { key };
   HandleScope scope(isolate_);
   ASSIGN_RETURN_ON_EXCEPTION(
       isolate_, object,
       Execution::Call(isolate_, fun, object, 1, argv),
       Object);
@@ skipping 515 matching lines @@
       SerializeString_<false, uint8_t>(object);
     } else {
       SerializeString_<false, uc16>(object);
     }
   }
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_JSON_STRINGIFIER_H_