dart2js cps: More type rules in type propagation.

pkg/compiler/lib/src/cps_ir/cps_ir_nodes.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.
 library dart2js.ir_nodes;
 
 import 'dart:collection';
 import 'cps_fragment.dart' show CpsFragment;
 import 'cps_ir_nodes_sexpr.dart';
 import '../constants/values.dart' as values;
 import '../dart_types.dart' show DartType, InterfaceType, TypeVariableType;
@@ skipping 681 matching lines @@
         this.arguments = _referenceList(arguments);
 
   accept(Visitor visitor) => visitor.visitInvokeMethodDirectly(this);
 
   bool get hasValue => true;
 
   void setParentPointers() {
     receiver.parent = this;
     _setParentsOnList(arguments, this);
   }
+
+  bool get isConstructorBodyCall => target is ConstructorBodyElement;
+  bool get isTearOff => selector.isGetter && !target.isGetter;
 }
 
 /// Non-const call to a constructor.
 ///
 /// The [target] may be a generative constructor (forwarding or normal)
 /// or a non-redirecting factory.
 ///
 /// All optional arguments declared by [target] are passed in explicitly, and
 /// occur in the [arguments] list, in normalized order.
 ///
@@ skipping 2194 matching lines @@
     plug(new Branch.loose(_definitions.getCopy(node.condition),
         _copies[node.trueContinuation.definition],
         _copies[node.falseContinuation.definition])
       ..isStrictCheck = node.isStrictCheck);
   }
 
   visitUnreachable(Unreachable node) {
     plug(new Unreachable());
   }
 }