Clean up code comments based on the changes in response to sra and johnniwinther's CL comments. (oo…

pkg/compiler/lib/src/js_model/closure.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.
 
 import 'package:kernel/ast.dart' as ir;
 
 import '../closure.dart';
 import '../common/tasks.dart';
 import '../elements/entities.dart';
 import '../kernel/element_map.dart';
@@ skipping 15 matching lines @@
 /// http://siek.blogspot.com/2012/07/essence-of-closure-conversion.html or
 /// http://matt.might.net/articles/closure-conversion/.
 // TODO(efortuna): Change inheritance hierarchy so that the
 // ClosureConversionTask doesn't inherit from ClosureTask because it's just a
 // glorified timer.
 class KernelClosureConversionTask extends ClosureConversionTask<ir.Node> {
   final KernelToElementMapForBuilding _elementMap;
   final GlobalLocalsMap _globalLocalsMap;
 
   /// Map of the scoping information that corresponds to a particular entity.
-  /// This particular map contains ScopeInfos only for entities that are *not*
-  /// closures. Entities that are closures are stored in the
-  /// [_loopClosureScopeMap]. TODO!!!
   Map<Entity, ScopeInfo> _scopeMap = <Entity, ScopeInfo>{};
   Map<ir.Statement, LoopClosureScope> _loopClosureScopeMap =
       <ir.Statement, LoopClosureScope>{};
 
   Map<Entity, ClosureRepresentationInfo> _closureRepresentationMap =
       <Entity, ClosureRepresentationInfo>{};
 
   /// Should only be used at the very beginning to ensure we are looking at the
   /// right kind of elements.
   // TODO(efortuna): Remove this map once we have one kernel backend strategy.
@@ skipping 235 matching lines @@
   // that (and the subsequent adjustment here) will follow soon.
   bool get isClosure => false;
 
   bool get isAbstract => false;
 
   // TODO(efortuna): Talk to Johnni.
   JLibrary get library => null;
 
   String toString() => '${jsElementPrefix}class($name)';
 }