Revert "Emit declarations for typedefs that are needed by reflection."

sdk/lib/_internal/compiler/implementation/js_emitter/metadata_emitter.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 dart2js.js_emitter;
 
 class MetadataEmitter extends CodeEmitterHelper {
   /// A list of JS expressions that represent metadata, parameter names and
   /// type, and return types.
   final List<String> globalMetadata = [];
@@ skipping 72 matching lines @@
   }
 
   int addGlobalMetadata(String string) {
     return globalMetadataMap.putIfAbsent(string, () {
       globalMetadata.add(string);
       return globalMetadata.length - 1;
     });
   }
 
   void emitMetadata(CodeBuffer buffer) {
-    buffer.write('init.metadata$_=$_[');
-    for (String metadata in globalMetadata) {
+    var literals = backend.typedefTypeLiterals.toList();
+    Elements.sortedByPosition(literals);
+    var properties = [];
+    for (TypedefElement literal in literals) {
+      var key = namer.getNameX(literal);
+      var value = js.number(reifyType(literal.rawType));
+      properties.add(new jsAst.Property(js.string(key), value));
+    }
+    var map = new jsAst.ObjectInitializer(properties);
+    buffer.write(
+        jsAst.prettyPrint(
+            js.statement('init.functionAliases = #', map), compiler));
+    buffer.write('${N}init.metadata$_=$_[');
+    for (var metadata in globalMetadata) {
       if (metadata is String) {
         if (metadata != 'null') {
           buffer.write(metadata);
         }
       } else {
         throw 'Unexpected value in metadata: ${Error.safeToString(metadata)}';
       }
       buffer.write(',$n');
     }
     buffer.write('];$n');
   }
 
   List<int> computeMetadata(FunctionElement element) {
     return compiler.withCurrentElement(element, () {
       if (!backend.retainMetadataOf(element)) return const <int>[];
       List<int> metadata = <int>[];
       Link link = element.metadata;
       // TODO(ahe): Why is metadata sometimes null?
       if (link != null) {
         for (; !link.isEmpty; link = link.tail) {
           metadata.add(reifyMetadata(link.head));
         }
       }
       return metadata;
     });
   }
 }