Encoding API: Enable test of ibm866

LayoutTests/fast/encoding/api/resources/shared.js

 // This file is based on non-normative encodings.json resource referenced by
 // http://encoding.spec.whatwg.org/ - a reference copy is saved in this
 // directory and can be updated via:
 //      curl -O http://encoding.spec.whatwg.org/encodings.json
 //
 // Changes made to this file are:
 //   * whitespace
 //   * encodings.json data assigned to `encodings_table` (for tests)
 //   * UTF encodings listed in `utf_encodings` (for tests)
-//   * 'ibm866' not yet supported - crbug.com/277023
 //   * 'gb18030' distinct from 'gbk' - crbug.com/339862
 //   * 'big5-hkscs' distinct from 'big5' - crbug.com/277040
 //   * 'hz-gb-2312' is replacement label - w3.org/Bugs/Public/show_bug.cgi?id=25339
 
 // Only these encodings are supported for encoding (vs. decoding)
 var utf_encodings = ["utf-8", "utf-16le", "utf-16be"];
 
 var encodings_table = [
     {
         "encodings": [
             {
                 "labels": [
                     "unicode-1-1-utf-8",
                     "utf-8",
                     "utf8"
                 ],
                 "name": "utf-8"
             }
         ],
         "heading": "The Encoding"
     },
     {
         "encodings": [
-            /* FIXME: Support ibm866 (crbug.com/277023)
             {
                 "labels": [
                     "866",
                     "cp866",
                     "csibm866",
                     "ibm866"
                 ],
                 "name": "ibm866"
             },
-             */
             {
                 "labels": [
                     "csisolatin2",
                     "iso-8859-2",
                     "iso-ir-101",
                     "iso8859-2",
                     "iso88592",
                     "iso_8859-2",
                     "iso_8859-2:1987",
                     "l2",
@@ skipping 410 matching lines @@
             {
                 "labels": [
                     "x-user-defined"
                 ],
                 "name": "x-user-defined"
             }
         ],
         "heading": "Legacy miscellaneous encodings"
     }
 ];