[type-profile] Handle returns correctly.

test/message/type-profile/collect-type-profile.js

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --type-profile --turbo --allow-natives-syntax
 
 function testFunction(param, flag) {
   // We want to test 2 different return positions in one function.
   if (flag) {
     var first_var = param;
@@ skipping 21 matching lines @@
 testFunction({x: 12});
 testFunction(new MyClass());
 
 %PrintTypeProfile(testFunction);
 
 function testReturnOfNonVariable() {
   return 32;
 }
 
 // Return statement is reached but its expression is never really returned.
-// TODO(franzih): The only return type should be 'string'.
 function try_finally() {
   try {
     return 23;
   } finally {
     return "nope, string is better"
   }
 }
 try_finally();
 %PrintTypeProfile(try_finally);
 
-// TODO(franzih): 'undefined' should be the return type.
 function fall_off() {
   //nothing
 }
 fall_off();
 %PrintTypeProfile(fall_off);
 
 
 
 
 testReturnOfNonVariable();
 
 throw "throw otherwise test fails with --stress-opt";