Add NoSourceLocationMarker in old source-info engine.

pkg/compiler/lib/src/js/js.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library js;
 
 import 'package:js_ast/js_ast.dart';
 
 import '../common.dart';
 import '../compiler.dart' show Compiler;
@@ skipping 57 matching lines @@
   void error(String message) {
     reporter.internalError(NO_LOCATION_SPANNABLE, message);
   }
 
   @override
   void emit(String string) {
     outBuffer.add(string);
   }
 
   @override
-  void enterNode(Node, int startPosition) {}
+  void enterNode(Node node, int startPosition) {
+    codePositionListener.onStartPosition(node, startPosition);
+  }
 
   @override
   void exitNode(
       Node node, int startPosition, int endPosition, int closingPosition) {
     if (monitor != null) {
       monitor.recordAstSize(node, endPosition - startPosition);
     }
     codePositionListener.onPositions(
         node, startPosition, endPosition, closingPosition);
   }
@@ skipping 97 matching lines @@
   }
   if (node is PropertyAccess) {
     PropertyAccess access = node;
     if (access.receiver is InterpolatedExpression) {
       InterpolatedExpression hole = access.receiver;
       return hole.isPositional && hole.nameOrPosition == 0;
     }
   }
   return false;
 }