[Mojo] Make javascript enums extensible.

mojo/public/js/validation_unittests.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 define([
     "console",
     "file",
     "gin/test/expect",
     "mojo/public/interfaces/bindings/tests/validation_test_interfaces.mojom",
     "mojo/public/js/buffer",
@@ skipping 209 matching lines @@
 
   function testMessageValidation(prefix, filters) {
     var testFiles = getMessageTestFiles(prefix);
     expect(testFiles.length).toBeGreaterThan(0);
 
     for (var i = 0; i < testFiles.length; i++) {
       // TODO(hansmuller) Temporarily skipping array pointer overflow tests
       // because JS numbers are limited to 53 bits.
       // TODO(yzshen) Skipping struct versioning tests (tests with "mthd11"
       // in the name) because the feature is not supported in JS yet.
-      // TODO(yzshen) Skipping enum validation tests (tests with "enum" in the
-      // name) because the feature is not supported in JS yet. crbug.com/581390
       // TODO(rudominer): Temporarily skipping 'no-such-method',
       // 'invalid_request_flags', and 'invalid_response_flags' until additional
       // logic in *RequestValidator and *ResponseValidator is ported from
       // cpp to js.
       // TODO(crbug/640298): Implement max recursion depth for JS.
       if (testFiles[i].indexOf("overflow") != -1 ||
           testFiles[i].indexOf("mthd11") != -1 ||
           testFiles[i].indexOf("conformance_mthd19") != -1 ||
-          testFiles[i].indexOf("enum") != -1 ||
+          testFiles[i].indexOf("conformance_mthd20") != -1 ||
           testFiles[i].indexOf("no_such_method") != -1 ||
           testFiles[i].indexOf("invalid_request_flags") != -1 ||
           testFiles[i].indexOf("invalid_response_flags") != -1) {
         console.log("[Skipping " + testFiles[i] + "]");
         continue;
       }
 
       var testMessage = readTestMessage(testFiles[i]);
       var handles = new Array(testMessage.handleCount);
       var message = new codec.Message(testMessage.buffer, handles);
@@ skipping 91 matching lines @@
   testConformanceMessageValidation();
   testBoundsCheckMessageValidation();
   testResponseConformanceMessageValidation();
   testResponseBoundsCheckMessageValidation();
   testIntegratedMessageHeaderValidation();
   testIntegratedResponseMessageValidation();
   testIntegratedRequestMessageValidation();
 
   this.result = "PASS";
 });