GlobalDictionary now stores PropertyDetails in PropertyCells.

src/runtime/runtime-object.cc

 // Copyright 2014 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/v8.h"
 
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/debug.h"
 #include "src/messages.h"
@@ skipping 584 matching lines @@
   if (receiver_obj->IsJSObject()) {
     if (!receiver_obj->IsJSGlobalProxy() &&
         !receiver_obj->IsAccessCheckNeeded() && key_obj->IsName()) {
       DisallowHeapAllocation no_allocation;
       Handle<JSObject> receiver = Handle<JSObject>::cast(receiver_obj);
       Handle<Name> key = Handle<Name>::cast(key_obj);
       if (receiver->IsGlobalObject()) {
         // Attempt dictionary lookup.
         GlobalDictionary* dictionary = receiver->global_dictionary();
         int entry = dictionary->FindEntry(key);
-        if ((entry != GlobalDictionary::kNotFound) &&
-            (dictionary->DetailsAt(entry).type() == DATA)) {
-          Object* value = dictionary->ValueAt(entry);
-          DCHECK(value->IsPropertyCell());
-          value = PropertyCell::cast(value)->value();
-          if (!value->IsTheHole()) return value;
-          // If value is the hole (meaning, absent) do the general lookup.
+        if (entry != GlobalDictionary::kNotFound) {
+          DCHECK(dictionary->ValueAt(entry)->IsPropertyCell());
+          PropertyCell* cell = PropertyCell::cast(dictionary->ValueAt(entry));
+          if (cell->property_details().type() == DATA) {
+            Object* value = cell->value();
+            if (!value->IsTheHole()) return value;
+            // If value is the hole (meaning, absent) do the general lookup.
+          }
         }
       } else if (!receiver->HasFastProperties()) {
         // Attempt dictionary lookup.
         NameDictionary* dictionary = receiver->property_dictionary();
         int entry = dictionary->FindEntry(key);
         if ((entry != NameDictionary::kNotFound) &&
             (dictionary->DetailsAt(entry).type() == DATA)) {
           Object* value = dictionary->ValueAt(entry);
           return value;
         }
@@ skipping 964 matching lines @@
   CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3);
 
   RETURN_FAILURE_ON_EXCEPTION(
       isolate,
       JSObject::DefineAccessor(object, name, isolate->factory()->null_value(),
                                setter, attrs));
   return isolate->heap()->undefined_value();
 }
 }  // namespace internal
 }  // namespace v8