In-place shrinking of descriptor arrays with non-live transitions.

src/objects-printer.cc

Index: src/objects-printer.cc
diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index 6714cdcb83e6dcc351f8b4ffb7f762888d360b37..ac3765e65dbd146ca4c26924970b1b9d97ccc22c 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -279,12 +279,10 @@ void JSObject::PrintProperties(FILE* out) {
         case CONSTANT_TRANSITION:
           PrintF(out, "(constant transition)\n");
           break;
-        case NULL_DESCRIPTOR:
-          PrintF(out, "(null descriptor)\n");
-          break;
         case NORMAL:  // only in slow mode
         case HANDLER:  // only in lookup results, not in descriptors
         case INTERCEPTOR:  // only in lookup results, not in descriptors
+        case NONEXISTENT:
           UNREACHABLE();
           break;
       }