[Mojo] Make javascript enums extensible.

mojo/public/js/validation_unittests.js

Index: mojo/public/js/validation_unittests.js
diff --git a/mojo/public/js/validation_unittests.js b/mojo/public/js/validation_unittests.js
index f2e3dadaf7bc2ad41ffcc2ec2c16970ea37b7f3c..7b1c173414ba7c0c46b43dc9348b23c89bf5c57b 100644
--- a/mojo/public/js/validation_unittests.js
+++ b/mojo/public/js/validation_unittests.js
@@ -227,8 +227,6 @@ define([
       // 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
@@ -237,7 +235,6 @@ define([
       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("no_such_method") != -1 ||
           testFiles[i].indexOf("invalid_request_flags") != -1 ||
           testFiles[i].indexOf("invalid_response_flags") != -1) {