Map deleted enum values to a sentinel value.

runtime/vm/isolate_reload_test.cc

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_api.h"
 #include "include/dart_tools_api.h"
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/isolate.h"
 #include "vm/lockers.h"
@@ skipping 2162 matching lines @@
       "  Banana,\n"
       "}\n"
       "var x;\n"
       "main() {\n"
       "  String r = '$x ${x.hashCode is int} ${x.index}';\n"
       "  return r;\n"
       "}\n";
 
   lib = TestCase::ReloadTestScript(kReloadScript);
   EXPECT_VALID(lib);
-  EXPECT_STREQ("Fruit.Cantalope true 2", SimpleInvokeStr(lib, "main"));
+  EXPECT_STREQ("Deleted enum value from Fruit true -1",
+               SimpleInvokeStr(lib, "main"));
 }
 
 
 TEST_CASE(IsolateReload_EnumIdentityReload) {
   const char* kScript =
       "enum Fruit {\n"
       "  Apple,\n"
       "  Banana,\n"
       "  Cantalope,\n"
       "}\n"
@@ skipping 925 matching lines @@
       "}\n";
 
   lib = TestCase::ReloadTestScript(kReloadScript);
   EXPECT_VALID(lib);
   EXPECT_STREQ("value=0:00:02.000000", SimpleInvokeStr(lib, "main"));
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart