Remove unnecessary LookupIterator instantiation

src/api.cc

 // 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.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 4037 matching lines @@
 Handle<Value> Function::GetDisplayName() const {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   ON_BAILOUT(isolate, "v8::Function::GetDisplayName()",
              return ToApiHandle<Primitive>(
                  isolate->factory()->undefined_value()));
   ENTER_V8(isolate);
   i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
   i::Handle<i::String> property_name =
       isolate->factory()->InternalizeOneByteString(
           STATIC_ASCII_VECTOR("displayName"));
-  i::LookupIterator it(func, property_name,
-                       i::LookupIterator::CHECK_DERIVED_PROPERTY);
 
   i::Handle<i::Object> value =
       i::JSObject::GetDataProperty(func, property_name);
   if (value->IsString()) {
     i::Handle<i::String> name = i::Handle<i::String>::cast(value);
     if (name->length() > 0) return Utils::ToLocal(name);
   }
 
   return ToApiHandle<Primitive>(isolate->factory()->undefined_value());
 }
@@ skipping 3580 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal