Removed transitions from the accessor pair descriptors.

src/runtime.cc

 // Copyright 2012 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 1512 matching lines @@
     // Declaring a const context slot is a conflicting declaration if
     // there is a callback with that name in a prototype. It is
     // allowed to introduce const variables in
     // JSContextExtensionObjects. They are treated specially in
     // SetProperty and no setters are invoked for those since they are
     // not real JSObjects.
     if (initial_value->IsTheHole() &&
         !object->IsJSContextExtensionObject()) {
       LookupResult lookup(isolate);
       object->Lookup(*name, &lookup);
-      if (lookup.IsCallbacks()) {
+      if (lookup.IsPropertyCallbacks()) {
         return ThrowRedeclarationError(isolate, "const", name);
       }
     }
     if (object->IsJSGlobalObject()) {
       // Define own property on the global object.
       RETURN_IF_EMPTY_HANDLE(isolate,
          JSObject::SetLocalPropertyIgnoreAttributes(object, name, value, mode));
     } else {
       RETURN_IF_EMPTY_HANDLE(isolate,
          JSReceiver::SetProperty(object, name, value, mode, kNonStrictMode));
@@ skipping 2980 matching lines @@
   CONVERT_ARG_HANDLE_CHECKED(String, name, 1);
   CONVERT_ARG_HANDLE_CHECKED(Object, obj_value, 2);
   CONVERT_SMI_ARG_CHECKED(unchecked, 3);
   RUNTIME_ASSERT((unchecked & ~(READ_ONLY | DONT_ENUM | DONT_DELETE)) == 0);
   PropertyAttributes attr = static_cast<PropertyAttributes>(unchecked);
 
   LookupResult result(isolate);
   js_object->LocalLookupRealNamedProperty(*name, &result);
 
   // Special case for callback properties.
-  if (result.IsCallbacks()) {
+  if (result.IsPropertyCallbacks()) {
     Object* callback = result.GetCallbackObject();
     // To be compatible with Safari we do not change the value on API objects
     // in Object.defineProperty(). Firefox disagrees here, and actually changes
     // the value.
     if (callback->IsAccessorInfo()) {
       return isolate->heap()->undefined_value();
     }
     // Avoid redefining foreign callback as data property, just use the stored
     // setter to update the value instead.
     // TODO(mstarzinger): So far this only works if property attributes don't
@@ skipping 9167 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal