pkg/dev_compiler/lib/js/legacy/dart_sdk.js

Index: pkg/dev_compiler/lib/js/legacy/dart_sdk.js
diff --git a/pkg/dev_compiler/lib/js/legacy/dart_sdk.js b/pkg/dev_compiler/lib/js/legacy/dart_sdk.js
index e0639d0a7afcfe3b542d9989b57e7efa3a4b8129..4aff9b345e8685bed9a6f6dd7a7100f9d6601747 100644
--- a/pkg/dev_compiler/lib/js/legacy/dart_sdk.js
+++ b/pkg/dev_compiler/lib/js/legacy/dart_sdk.js
@@ -3336,7 +3336,7 @@ dart_library.library('dart_sdk', null, /* Imports */[
         protoChain[dartx.add](current);
         current = _debugger.safeGetProperty(current, '__proto__');
       }
-      for (/* Unimplemented unknown name */current of protoChain) {
+      for (current of protoChain) {
         for (let symbol of _debugger.getOwnPropertySymbols(current)) {
           let dartName = _debugger.symbolName(symbol);
           if (dart.test(_debugger.hasMethod(object, dartName))) {
@@ -3352,7 +3352,7 @@ dart_library.library('dart_sdk', null, /* Imports */[
           properties.add(new _debugger.NameValuePair({name: dartName, value: value}));
         }
       }
-      for (/* Unimplemented unknown name */current of protoChain) {
+      for (current of protoChain) {
         let className = dart.dload(dart.getReifiedType(current), 'name');
         for (let name of _debugger.getOwnPropertyNames(current)) {
           if (dart.test(_debugger.ObjectFormatter._customNames.contains(name)) || dart.equals(name, className)) continue;