Introduce a new AccessorPair type for handling JavaScript accessors.

src/profile-generator.cc

 // 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 2208 matching lines @@
           }
           break;
         }
         case CONSTANT_FUNCTION:
           SetPropertyReference(
               js_obj, entry,
               descs->GetKey(i), descs->GetConstantFunction(i));
           break;
         case CALLBACKS: {
           Object* callback_obj = descs->GetValue(i);
-          if (callback_obj->IsFixedArray()) {
-            FixedArray* accessors = FixedArray::cast(callback_obj);
-            if (Object* getter = accessors->get(JSObject::kGetterIndex)) {
+          if (callback_obj->IsAccessorPair()) {
+            AccessorPair* accessors = AccessorPair::cast(callback_obj);
+            if (Object* getter = accessors->getter()) {
               SetPropertyReference(js_obj, entry, descs->GetKey(i),
                                    getter, "get-%s");
             }
-            if (Object* setter = accessors->get(JSObject::kSetterIndex)) {
+            if (Object* setter = accessors->setter()) {
               SetPropertyReference(js_obj, entry, descs->GetKey(i),
                                    setter, "set-%s");
             }
           }
           break;
         }
         case NORMAL:  // only in slow mode
         case HANDLER:  // only in lookup results, not in descriptors
         case INTERCEPTOR:  // only in lookup results, not in descriptors
         case MAP_TRANSITION:  // we do not care about transitions here...
@@ skipping 1388 matching lines @@
 
 
 void HeapSnapshotJSONSerializer::SortHashMap(
     HashMap* map, List<HashMap::Entry*>* sorted_entries) {
   for (HashMap::Entry* p = map->Start(); p != NULL; p = map->Next(p))
     sorted_entries->Add(p);
   sorted_entries->Sort(SortUsingEntryValue);
 }
 
 } }  // namespace v8::internal