Migrate instance of deprecated maps in HCheckMaps.

src/objects.cc

 // Copyright 2013 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 2701 matching lines @@
   for (; descriptor < descriptors; descriptor++) {
     MaybeObject* maybe_map = new_map->CopyInstallDescriptors(
         descriptor, new_descriptors);
     if (!maybe_map->To(&new_map)) {
       // Create a handle for the last created map to ensure it stays alive
       // during GC. Its descriptor array is too large, but it will be
       // overwritten during retry anyway.
       Handle<Map>(new_map);
       return maybe_map;
     }
+    new_map->set_migration_target(true);
   }
 
   new_map->set_owns_descriptors(true);
   return new_map;
 }
 
 
 Map* Map::CurrentMapForDeprecated() {
   DisallowHeapAllocation no_allocation;
   if (!is_deprecated()) return this;
@@ skipping 3778 matching lines @@
   Map* result;
   MaybeObject* maybe_result = RawCopy(new_instance_size);
   if (!maybe_result->To(&result)) return maybe_result;
 
   if (mode != CLEAR_INOBJECT_PROPERTIES) {
     result->set_inobject_properties(inobject_properties());
   }
 
   result->set_is_shared(sharing == SHARED_NORMALIZED_MAP);
   result->set_dictionary_map(true);
+  result->set_migration_target(false);
 
 #ifdef VERIFY_HEAP
   if (FLAG_verify_heap && result->is_shared()) {
     result->SharedMapVerify();
   }
 #endif
 
   return result;
 }
 
@@ skipping 9428 matching lines @@
 
 void PropertyCell::AddDependentCode(Handle<Code> code) {
   Handle<DependentCode> codes = DependentCode::Insert(
       Handle<DependentCode>(dependent_code()),
       DependentCode::kPropertyCellChangedGroup, code);
   if (*codes != dependent_code()) set_dependent_code(*codes);
 }
 
 
 } }  // namespace v8::internal