dart2js: Accept named holes in js-templates.

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

 // Copyright (c) 2012, 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.
 
 part of js;
 
 class Printer extends Indentation implements NodeVisitor {
   final bool shouldCompressOutput;
   leg.Compiler compiler;
   leg.CodeBuffer outBuffer;
@@ skipping 856 matching lines @@
       visit(inputs[i]);
       out(parts[i + 1]);
     }
   }
 
   visitLiteralStatement(LiteralStatement node) {
     outLn(node.code);
   }
 
   visitInterpolatedNode(InterpolatedNode node) {
-    out('#${node.name}');
+    out('#${node.nameOrPosition}');
   }
 
   visitInterpolatedExpression(InterpolatedExpression node) =>
       visitInterpolatedNode(node);
 
   visitInterpolatedLiteral(InterpolatedLiteral node) =>
       visitInterpolatedNode(node);
 
   visitInterpolatedParameter(InterpolatedParameter node) =>
       visitInterpolatedNode(node);
 
   visitInterpolatedSelector(InterpolatedSelector node) =>
       visitInterpolatedNode(node);
 
   visitInterpolatedStatement(InterpolatedStatement node) {
-    outLn('#${node.name}');
+    outLn('#${node.nameOrPosition}');
   }
 
   void visitComment(Comment node) {
     if (shouldCompressOutput) return;
     String comment = node.comment.trim();
     if (comment.isEmpty) return;
     for (var line in comment.split('\n')) {
       if (comment.startsWith('//')) {
         outIndentLn(line.trim());
       } else {
@@ skipping 264 matching lines @@
         codes.add(nthLetter((n ~/ nameSpaceSize) % LETTERS));
       }
       codes.add(charCodes.$0 + digit);
       newName = new String.fromCharCodes(codes);
     }
     assert(new RegExp(r'[a-zA-Z][a-zA-Z0-9]*').hasMatch(newName));
     maps.last[oldName] = newName;
     return newName;
   }
 }