Add member type to model.

pkg/compiler/lib/src/js_emitter/old_emitter/container_builder.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;
 
 /// This class should morph into something that makes it easy to build
 /// JavaScript representations of libraries, class-sides, and instance-sides.
 /// Initially, it is just a placeholder for code that is moved from
 /// [CodeEmitterTask].
@@ skipping 110 matching lines @@
         // instance data, we can eliminate this element.
         expressions.add(js('null'));
       }
       String callName = stub.callName;
       String callSelectorString = (callName == null) ? 'null' : '"$callName"';
       tearOffInfo.add(new jsAst.LiteralString(callSelectorString));
     }
 
     jsAst.Expression memberTypeExpression;
     if (canTearOff || canBeReflected) {
-      DartType memberType;
-      if (member.isGenerativeConstructorBody) {
-        var body = member;
-        memberType = body.constructor.type;
-      } else {
-        memberType = member.type;
-      }
+      DartType memberType = method.type;
       if (memberType.containsTypeVariables) {
         jsAst.Expression thisAccess = js(r'this.$receiver');
         memberTypeExpression =
             backend.rti.getSignatureEncoding(memberType, thisAccess);
       } else {
         memberTypeExpression =
             js.number(task.metadataCollector.reifyType(memberType));
       }
     } else {
       memberTypeExpression = js('null');
@@ skipping 49 matching lines @@
     jsAst.ArrayInitializer arrayInit =
       new jsAst.ArrayInitializer(expressions.toList());
     compiler.dumpInfoTask.registerElementAst(member,
         builder.addProperty(name, arrayInit));
   }
 
   void addMemberField(Field field, ClassBuilder builder) {
     // For now, do nothing.
   }
 }