dart2js cps: More type rules in type propagation.

pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart

Index: pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart
index e73dd846c674e07c154c69781fc54ade0d53c937..b0af0b99253e6a1fa3c2699e67f28acbc7820339 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart
@@ -699,6 +699,9 @@ class InvokeMethodDirectly extends InvocationPrimitive {
     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.