Do TypePropagation again after inlining

tests/compiler/dart2js/cps_ir/expected/closures_10.js

 // Expectation for test: 
 // class A {
 //   a() => 1;
 //   b() => () => a();
 // }
 // main() {
 //   print(new A().b()());
 // }
 
 function() {
-  var line = H.S(new V.A_b_closure(V.A$()).call$0());
+  var line = H.S(V.A$().a$0());
   if (typeof dartPrint == "function")
     dartPrint(line);
   else if (typeof console == "object" && typeof console.log != "undefined")
     console.log(line);
   else if (!(typeof window == "object")) {
     if (!(typeof print == "function"))
       throw "Unable to print message: " + String(line);
     print(line);
   }
 }