Refactoring only: Make the handling of PropertyType more explicit.

src/objects-printer.cc

Index: src/objects-printer.cc
diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index 1ca97de8675e7ebf8972b43ef2c1b3848f4defc5..c9f3f842dff455516bdf53a09da306dd876e0dca 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -295,7 +295,9 @@ void JSObject::PrintProperties(FILE* out) {
         case NULL_DESCRIPTOR:
           PrintF(out, "(null descriptor)\n");
           break;
-        default:
+        case NORMAL:  // only in slow mode
+        case HANDLER:  // only in lookup results, not in descriptors
+        case INTERCEPTOR:  // only in lookup results, not in descriptors
           UNREACHABLE();
           break;
       }