Small fixes to top level type inference.

pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.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;
 
 class A {
   T f<T>(T t) => t;
   int g(dynamic i) => 0;
 }
 
 var /*@topType=A*/ a = new A();
 
 // There's a circularity between b and c because a.f is generic, so the type of
 // c is required to infer b, and vice versa.
 
-var /*@topType=() -> dynamic*/ b = /*@returnType=() -> dynamic*/ () =>
-    a. /*@typeArgs=() -> dynamic*/ /*@target=A::f*/ f(c);
-var /*@topType=() -> dynamic*/ c = /*@returnType=() -> dynamic*/ () =>
-    a. /*@typeArgs=() -> dynamic*/ /*@target=A::f*/ f(b);
+var /*@topType=dynamic*/ b = /*@returnType=dynamic*/ () =>
+    a. /*@typeArgs=dynamic*/ /*@target=A::f*/ f(c);
+var /*@topType=dynamic*/ c = /*@returnType=dynamic*/ () =>
+    a. /*@typeArgs=dynamic*/ /*@target=A::f*/ f(b);
 
 // e's use of a.g breaks the circularity, because a.g is not generic, therefore
 // the type of e does not depend on the type of d.
 
-var /*@topType=() -> dynamic*/ d = /*@returnType=() -> int*/ () =>
+var /*@topType=() -> () -> int*/ d = /*@returnType=() -> int*/ () =>
     a. /*@typeArgs=() -> int*/ /*@target=A::f*/ f(e);
 var /*@topType=() -> int*/ e = /*@returnType=int*/ () =>
     a. /*@target=A::g*/ g(d);
 
 main() {}