Reduce use of getClosureInfoForMember and cleanup closure_test

tests/compiler/dart2js/closure/data/captured_variable.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.
 
 /*readParameterInAnonymousClosure:*/
 readParameterInAnonymousClosure(/**/ parameter) {
   return /*captured=[parameter],free=[parameter]*/ () => parameter;
 }
 
 /*readParameterInClosure:*/
 readParameterInClosure(/**/ parameter) {
   /*captured=[parameter],free=[parameter]*/ func() => parameter;
   return func;
 }
 
-/*writeParameterInAnonymousClosure:boxed=[parameter],captured=[parameter],requiresBox*/
+/*writeParameterInAnonymousClosure:boxed=[parameter],requiresBox*/
 writeParameterInAnonymousClosure(/*boxed*/ parameter) {
   return /*boxed=[parameter],captured=[parameter],free=[box,parameter]*/ () {
     parameter = 42;
   };
 }
 
-/*writeParameterInClosure:boxed=[parameter],captured=[parameter],requiresBox*/
+/*writeParameterInClosure:boxed=[parameter],requiresBox*/
 writeParameterInClosure(/*boxed*/ parameter) {
   /*boxed=[parameter],captured=[parameter],free=[box,parameter]*/ func() {
     parameter = 42;
   }
 
   return func;
 }
 
 /*readLocalInAnonymousClosure:*/
 readLocalInAnonymousClosure(/**/ parameter) {
   var /**/ local = parameter;
   return /*captured=[local],free=[local]*/ () => local;
 }
 
 /*readLocalInClosure:*/
 readLocalInClosure(/**/ parameter) {
   var /**/ local = parameter;
   /*captured=[local],free=[local]*/ func() => local;
   return func;
 }
 
-/*writeLocalInAnonymousClosure:boxed=[local],captured=[local],requiresBox*/
+/*writeLocalInAnonymousClosure:boxed=[local],requiresBox*/
 writeLocalInAnonymousClosure(/**/ parameter) {
   // ignore: UNUSED_LOCAL_VARIABLE
   var /*boxed*/ local = parameter;
   return /*boxed=[local],captured=[local],free=[box,local]*/ () {
     local = 42;
   };
 }
 
-/*writeLocalInClosure:boxed=[local],captured=[local],requiresBox*/

[Emily Fortuna, 2017/08/22 20:46:17]

I'm confused why these get removed now? 

[Johnni Winther, 2017/08/23 07:32:21]

Because I'm no longer using .getClosureInfoForMemberTesting.

+/*writeLocalInClosure:boxed=[local],requiresBox*/
 writeLocalInClosure(/**/ parameter) {
   // ignore: UNUSED_LOCAL_VARIABLE
   var /*boxed*/ local = parameter;
   /*boxed=[local],captured=[local],free=[box,local]*/ func() {
     local = 42;
   }
 
   return func;
 }
 
 main() {
   readParameterInAnonymousClosure(null);
   readParameterInClosure(null);
   writeParameterInAnonymousClosure(null);
   writeParameterInClosure(null);
   readLocalInAnonymousClosure(null);
   readLocalInClosure(null);
   writeLocalInAnonymousClosure(null);
   writeLocalInClosure(null);
 }