Gcstress bug fix: Transition arrays may get smaller during gc.

src/objects-inl.h

 // 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 4951 matching lines @@
 
 
 // If the descriptor is using the empty transition array, install a new empty
 // transition array that will have place for an element transition.
 static void EnsureHasTransitionArray(Handle<Map> map) {
   Handle<TransitionArray> transitions;
   if (!map->HasTransitionArray()) {
     transitions = TransitionArray::Allocate(map->GetIsolate(), 0);
     transitions->set_back_pointer_storage(map->GetBackPointer());
   } else if (!map->transitions()->IsFullTransitionArray()) {
-    transitions = TransitionArray::ExtendToFullTransitionArray(
-        handle(map->transitions()));
+    transitions = TransitionArray::ExtendToFullTransitionArray(map);
   } else {
     return;
   }
   map->set_transitions(*transitions);
 }
 
 
 void Map::InitializeDescriptors(DescriptorArray* descriptors) {
   int len = descriptors->number_of_descriptors();
   set_instance_descriptors(descriptors);
@@ skipping 2099 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_