replacement is an encoding label now

See whatwg/encoding#117 for the corresponding
Encoding Standard change.

Author: annevk

encoding/api-invalid-label.html

@@ -8,9 +8,7 @@
 var tests = ["invalid-invalidLabel"];
 setup(function() {
   encodings_table.forEach(function(section) {
-    section.encodings.filter(function(encoding) {
-      return encoding.name !== 'replacement';
-    }).forEach(function(encoding) {
+    section.encodings.forEach(function(encoding) {
       encoding.labels.forEach(function(label) {
         ["\u0000", "\u000b", "\u00a0", "\u2028", "\u2029"].forEach(function(ws) {
           tests.push(ws + label);

encoding/api-replacement-encodings.html

@@ -5,10 +5,6 @@
 <script src="resources/encodings.js"></script>
 <script>
 
-test(function() {
-    assert_throws(new RangeError(), function() { new TextDecoder('replacement'); });
-}, 'The "replacement" label should not be a known encoding.');
-
 encodings_table.forEach(function(section) {
     section.encodings.filter(function(encoding) {
         return encoding.name === 'replacement';

encoding/resources/encodings.js

@@ -431,7 +431,8 @@ var encodings_table =
           "hz-gb-2312",
           "iso-2022-cn",
           "iso-2022-cn-ext",
-          "iso-2022-kr"
+          "iso-2022-kr",
+          "replacement"
         ],
         "name": "replacement"
       },