Remember and reuse derived map for external arrays

src/property.cc

 // Copyright 2006-2008 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 34 matching lines @@
     case NORMAL:
       PrintF(out, " -type = normal\n");
       PrintF(out, " -entry = %d", GetDictionaryEntry());
       break;
     case MAP_TRANSITION:
       PrintF(out, " -type = map transition\n");
       PrintF(out, " -map:\n");
       GetTransitionMap()->Print(out);
       PrintF(out, "\n");
       break;
+    case EXTERNAL_ARRAY_TRANSITION:
+      PrintF(out, " -type = external array transition\n");
+      PrintF(out, " -map:\n");
+      GetTransitionMap()->Print(out);
+      PrintF(out, "\n");
+      break;
     case CONSTANT_FUNCTION:
       PrintF(out, " -type = constant function\n");
       PrintF(out, " -function:\n");
       GetConstantFunction()->Print(out);
       PrintF(out, "\n");
       break;
     case FIELD:
       PrintF(out, " -type = field\n");
       PrintF(out, " -index = %d", GetFieldIndex());
       PrintF(out, "\n");
@@ skipping 22 matching lines @@
   PrintF(out, " @ ");
   GetValue()->ShortPrint(out);
   PrintF(out, " %d\n", GetDetails().index());
 }
 
 
 #endif
 
 
 } }  // namespace v8::internal