Add case for EXTERNAL_ARRAY_TRANSITION to JSObject::NormalizeProperties

Review URL: http://codereview.chromium.org/7004014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7852 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/objects.cc

@@ -2580,6 +2580,7 @@ MaybeObject* JSObject::NormalizeProperties(PropertyNormalizationMode mode,
       case CONSTANT_TRANSITION:
       case NULL_DESCRIPTOR:
       case INTERCEPTOR:
+      case EXTERNAL_ARRAY_TRANSITION:
         break;
       default:
         UNREACHABLE();