Set MethodInvocation.interfaceTarget during type inference.

pkg/front_end/testcases/inference/block_bodied_lambdas_lub.dart

Index: pkg/front_end/testcases/inference/block_bodied_lambdas_lub.dart
diff --git a/pkg/front_end/testcases/inference/block_bodied_lambdas_lub.dart b/pkg/front_end/testcases/inference/block_bodied_lambdas_lub.dart
index 60318d222785a186faf1add50ccea02245700e38..3434b3679985149d37eb96db6c9566107bb1cce7 100644
--- a/pkg/front_end/testcases/inference/block_bodied_lambdas_lub.dart
+++ b/pkg/front_end/testcases/inference/block_bodied_lambdas_lub.dart
@@ -10,11 +10,14 @@ import 'dart:math' show Random;
 test2() {
   List<num> o;
   var /*@type=Iterable<num>*/ y = /*@promotedType=none*/ o
-      . /*@typeArgs=num*/ map(/*@returnType=num*/ (/*@type=num*/ x) {
-    if (new Random().nextBool()) {
-      return /*@promotedType=none*/ x.toInt() + 1;
+      . /*@typeArgs=num*/ /*@target=List::map*/ map(
+          /*@returnType=num*/ (/*@type=num*/ x) {
+    if (new Random(). /*@target=dart.math::Random::nextBool*/ nextBool()) {
+      return /*@promotedType=none*/ x
+              . /*@target=num::toInt*/ toInt() /*@target=num::+*/ +
+          1;
     } else {
-      return /*@promotedType=none*/ x.toDouble();
+      return /*@promotedType=none*/ x. /*@target=num::toDouble*/ toDouble();
     }
   });
   Iterable<num> w = /*@promotedType=none*/ y;