Tiny cleanup of DescriptorArrays lookups

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 57483177854d3928d838967bf9c8a98adc7f6a54..39aba0b2b85608fb4e746c4bbe849d9baaf0774c 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -2177,32 +2177,15 @@ MaybeObject* JSObject::SetPropertyViaPrototypes(
 }
 
 
-void JSObject::LookupInDescriptor(String* name, LookupResult* result) {
-  DescriptorArray* descriptors = map()->instance_descriptors();
-  int number = descriptors->SearchWithCache(name);
-  if (number != DescriptorArray::kNotFound) {
-    result->DescriptorResult(this, descriptors->GetDetails(number), number);
-  } else {
-    result->NotFound();
-  }
-}
-
-
 void Map::LookupInDescriptors(JSObject* holder,
                               String* name,
                               LookupResult* result) {
   DescriptorArray* descriptors = instance_descriptors();
-  DescriptorLookupCache* cache =
-      GetHeap()->isolate()->descriptor_lookup_cache();
-  int number = cache->Lookup(descriptors, name);
-  if (number == DescriptorLookupCache::kAbsent) {
-    number = descriptors->Search(name);
-    cache->Update(descriptors, name, number);
-  }
-  if (number != DescriptorArray::kNotFound) {
-    result->DescriptorResult(holder, descriptors->GetDetails(number), number);
-  } else {
+  int number = descriptors->SearchWithCache(name);
+  if (number == DescriptorArray::kNotFound) {
     result->NotFound();
+  } else {
+    result->DescriptorResult(holder, descriptors->GetDetails(number), number);
   }
 }
 
@@ -2418,7 +2401,7 @@ void JSObject::LocalLookupRealNamedProperty(String* name,
   }
 
   if (HasFastProperties()) {
-    LookupInDescriptor(name, result);
+    map()->LookupInDescriptors(this, name, result);
     if (result->IsFound()) {
       // A property, a map transition or a null descriptor was found.
       // We return all of these result types because