Backport @10366 to 3.6

src/objects-debug.cc

 // Copyright 2011 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 682 matching lines @@
       info->number_of_fast_unused_elements_ += holes;
       break;
     }
     case EXTERNAL_PIXEL_ELEMENTS: {
       info->number_of_objects_with_fast_elements_++;
       ExternalPixelArray* e = ExternalPixelArray::cast(elements());
       info->number_of_fast_used_elements_ += e->length();
       break;
     }
     case DICTIONARY_ELEMENTS: {
-      NumberDictionary* dict = element_dictionary();
+      SeededNumberDictionary* dict = element_dictionary();
       info->number_of_slow_used_elements_ += dict->NumberOfElements();
       info->number_of_slow_unused_elements_ +=
           dict->Capacity() - dict->NumberOfElements();
       break;
     }
     default:
       UNREACHABLE();
       break;
   }
 }
@@ skipping 94 matching lines @@
         ASSERT(e->IsUndefined());
       }
     }
   }
 }
 
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal