Chase imports in analyzer's front_end_inference_test.

pkg/front_end/testcases/inference/infer_statics_transitively3.dart

 // Copyright (c) 2017, 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.
 
 /*@testedFeatures=inference*/
 library test;
 
 import 'infer_statics_transitively3_a.dart' show a1, A;
 import 'infer_statics_transitively3_a.dart' as p show a2, A;
 
 const /*@topType=int*/ t1 = 1;
 const /*@topType=int*/ t2 = t1;
-const /*@topType=dynamic*/ t3 = a1;
-const /*@topType=dynamic*/ t4 = p.a2;
+const /*@topType=int*/ t3 = a1;
+const /*@topType=int*/ t4 = p.a2;
 const /*@topType=dynamic*/ t5 = A.a3;
 const /*@topType=dynamic*/ t6 = p.A.a3;
 
 foo() {
   int i;
   i = t1;
   i = t2;
   i = t3;
   i = t4;
 }
+
+main() {}