Add missing checks for failure after AddElementsTransition.

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 3920 matching lines @@
   Object* array_function =
       global_context->get(Context::ARRAY_FUNCTION_INDEX);
   if (array_function->IsJSFunction() &&
       this == JSFunction::cast(array_function)) {
     ASSERT(initial_map->elements_kind() == FAST_SMI_ONLY_ELEMENTS);
 
     MaybeObject* maybe_map = initial_map->CopyDropTransitions();
     Map* new_double_map = NULL;
     if (!maybe_map->To<Map>(&new_double_map)) return maybe_map;
     new_double_map->set_elements_kind(FAST_DOUBLE_ELEMENTS);
-    initial_map->AddElementsTransition(FAST_DOUBLE_ELEMENTS, new_double_map);
+    maybe_map = initial_map->AddElementsTransition(FAST_DOUBLE_ELEMENTS,
+                                                   new_double_map);
+    if (maybe_map->IsFailure()) return maybe_map;
 
     maybe_map = new_double_map->CopyDropTransitions();
     Map* new_object_map = NULL;
     if (!maybe_map->To<Map>(&new_object_map)) return maybe_map;
     new_object_map->set_elements_kind(FAST_ELEMENTS);
-    new_double_map->AddElementsTransition(FAST_ELEMENTS, new_object_map);
+    maybe_map = new_double_map->AddElementsTransition(FAST_ELEMENTS,
+                                                      new_object_map);
+    if (maybe_map->IsFailure()) return maybe_map;
 
     global_context->set_smi_js_array_map(initial_map);
     global_context->set_double_js_array_map(new_double_map);
     global_context->set_object_js_array_map(new_object_map);
   }
   set_initial_map(initial_map);
   return this;
 }
 
 
@@ skipping 938 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_