Only emit members in mirror helper symbolsmap.

sdk/lib/_internal/compiler/implementation/mirror_renamer/renamer.dart

 // Copyright (c) 2013, 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 mirror_renamer;
 
 class MirrorRenamer {
   static const String MIRROR_HELPER_GET_NAME_FUNCTION = 'helperGetName';
   static const String MIRROR_HELPER_LIBRARY_NAME = '_mirror_helper';
   static const String MIRROR_HELPER_SYMBOLS_MAP_NAME = '_SYMBOLS';
@@ skipping 29 matching lines @@
   }
 
   /**
    * Adds a toplevel node to the output containing a map from the mangled
    * to the unmangled names and replaces calls to MirrorSystem.getName()
    * with calls to the corresponding wrapper from _mirror_helper which has
    * been added during resolution. [renames] is assumed to map nodes in user
    * code to mangled names appearing in output code, and [topLevelNodes] should
    * contain all the toplevel ast nodes that will be emitted in the output.
    */
-  void addRenames(Map<Node, String> renames, List<Node> topLevelNodes) {
+  void addRenames(Map<Node, String> renames, List<Node> topLevelNodes,
+                  PlaceholderCollector placeholderCollector) {
 
     Node parse(String text) {
       Token tokens = compiler.scanner.tokenize(text);
       return compiler.parser.parseCompilationUnit(tokens);
     }
 
-    // Add toplevel map containing all renames.
+    // Add toplevel map containing all renames of members.
     symbols = new Map<String, SourceString>();
-    for (Node node in renames.keys) {
-      Identifier identifier = node.asIdentifier();
-      if (identifier != null) {
-        symbols.putIfAbsent(renames[node], () => identifier.source);
-      }
+    for (Set<Identifier> s in placeholderCollector.memberPlaceholders.values) {
+      // All members in a set have the same name so we only need to look at one.
+      Identifier sampleNode = s.first;
+      symbols.putIfAbsent(renames[sampleNode], () => sampleNode.source);
     }
 
     Identifier symbolsMapIdentifier =
         mirrorHelperSymbolsMapNode.definitions.nodes.head.asSend().selector;
     assert(symbolsMapIdentifier != null);
     topLevelNodes.remove(mirrorHelperSymbolsMapNode);
 
     StringBuffer sb = new StringBuffer(
         'const ${renames[symbolsMapIdentifier]} = const<String,SourceString>{');
     bool first = true;
     for (String mangledName in symbols.keys) {
       if (!first) {
         sb.write(',');
       } else {
         first = false;
       }
       sb.write("'$mangledName' : '${symbols[mangledName]}'");
     }
     sb.write('};');
     topLevelNodes.add(parse(sb.toString()));
 
     // Replace calls to Mirrorsystem.getName with calls to helper function.
     mirrorSystemGetNameNodes.forEach((node) {
       renames[node.selector] = renames[mirrorHelperGetNameFunctionNode.name];
       renames[node.receiver] = '';
     });
   }
 }