Removed duplicate line.

src/objects.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 7424 matching lines @@
 
   DescriptorArray* descriptors = instance_descriptors();
   bool descriptors_owner_died = false;
 
   // Compact all live descriptors to the left.
   for (int i = 0; i < t->number_of_transitions(); ++i) {
     Map* target = t->GetTarget(i);
     if (ClearBackPointer(heap, target)) {
       if (target->instance_descriptors() == descriptors) {
         descriptors_owner_died = true;
-        descriptors_owner_died = true;
       }
     } else {
       if (i != transition_index) {
         String* key = t->GetKey(i);
         t->SetKey(transition_index, key);
         Object** key_slot = t->GetKeySlot(transition_index);
         collector->RecordSlot(key_slot, key_slot, key);
         // Target slots do not need to be recorded since maps are not compacted.
         t->SetTarget(transition_index, t->GetTarget(i));
       }
@@ skipping 6016 matching lines @@
   set_year(Smi::FromInt(year), SKIP_WRITE_BARRIER);
   set_month(Smi::FromInt(month), SKIP_WRITE_BARRIER);
   set_day(Smi::FromInt(day), SKIP_WRITE_BARRIER);
   set_weekday(Smi::FromInt(weekday), SKIP_WRITE_BARRIER);
   set_hour(Smi::FromInt(hour), SKIP_WRITE_BARRIER);
   set_min(Smi::FromInt(min), SKIP_WRITE_BARRIER);
   set_sec(Smi::FromInt(sec), SKIP_WRITE_BARRIER);
 }
 
 } }  // namespace v8::internal