Add member type to model.

pkg/compiler/lib/src/js_emitter/program_builder.dart

 // Copyright (c) 2014, 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 dart2js.js_emitter.program_builder;
 
 import 'js_emitter.dart' show computeMixinClass;
 import 'model.dart';
 
 import '../common.dart';
@@ skipping 458 matching lines @@
       assert(invariant(element, !element.isConstructor));
     }
 
     String callName = null;
     if (canTearOff) {
       Selector callSelector =
           new Selector.fromElement(element).toCallSelector();
       callName = namer.invocationName(callSelector);
     }
 
+    DartType memberType;
+    if (element.isGenerativeConstructorBody) {
+      // TODO(herhut): Why does this need to be normalized away? We never need
+      //               this information anyway as they cannot be torn off or
+      //               reflected.
+      var body = element;
+      memberType = body.constructor.type;
+    } else {
+      memberType = element.type;
+    }
+
     return new InstanceMethod(element, name, code,
-        _generateParameterStubs(element, canTearOff), callName,
+        _generateParameterStubs(element, canTearOff), callName, memberType,
         needsTearOff: canTearOff, tearOffName: tearOffName,
         isClosure: isClosure, aliasName: aliasName,
         canBeApplied: canBeApplied, canBeReflected: canBeReflected);
   }
 
   List<ParameterStubMethod> _generateParameterStubs(FunctionElement element,
                                                     bool canTearOff) {
 
     if (!_methodNeedsStubs(element)) return const <ParameterStubMethod>[];
 
@@ skipping 121 matching lines @@
     String callName = null;
     if (needsTearOff) {
       Selector callSelector =
           new Selector.fromElement(element).toCallSelector();
       callName = namer.invocationName(callSelector);
     }
 
     return new StaticDartMethod(element,
                                 name, _registry.registerHolder(holder), code,
                                 _generateParameterStubs(element, needsTearOff),
-                                callName,
+                                callName, element.type,
                                 needsTearOff: needsTearOff,
                                 tearOffName: tearOffName,
                                 canBeApplied: canBeApplied,
                                 canBeReflected: canBeReflected);
   }
 
   void _registerConstants(OutputUnit outputUnit,
                           Iterable<ConstantValue> constantValues) {
     // `constantValues` is null if an outputUnit doesn't contain any constants.
     if (constantValues == null) return;
     for (ConstantValue constantValue in constantValues) {
       _registry.registerConstant(outputUnit, constantValue);
       assert(!_constants.containsKey(constantValue));
       String name = namer.constantName(constantValue);
       String constantObject = namer.globalObjectForConstant(constantValue);
       Holder holder = _registry.registerHolder(constantObject);
       Constant constant = new Constant(name, holder, constantValue);
       _constants[constantValue] = constant;
     }
   }
 }