dart2js cps: Remove unneeded bailout on captured loop variables.

pkg/compiler/lib/src/cps_ir/cps_ir_builder.dart

 // Copyright (c) 2013, 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.
 
 library dart2js.ir_builder;
 
 import '../closure.dart' hide ClosureScope;
 import '../common.dart';
 import '../common/names.dart' show
     Names,
@@ skipping 16 matching lines @@
 import '../tree/tree.dart' as ast;
 import '../types/types.dart' show
     TypeMask;
 import '../universe/call_structure.dart' show
     CallStructure;
 import '../universe/selector.dart' show
     Selector,
     SelectorKind;
 
 import 'cps_ir_builder_task.dart' show
-    DartCapturedVariables,
     GlobalProgramInformation;
 import 'cps_ir_nodes.dart' as ir;
 
 
 /// A mapping from variable elements to their compile-time values.
 ///
 /// Map elements denoted by parameters and local variables to the
 /// [ir.Primitive] that is their value.  Parameters and locals are
 /// assigned indexes which can be used to refer to them.
 class Environment {
@@ skipping 2838 matching lines @@
 }
 
 class SwitchCaseInfo {
   final List<ir.Primitive> constants = <ir.Primitive>[];
   final SubbuildFunction buildBody;
 
   SwitchCaseInfo(this.buildBody);
 
   void addConstant(ir.Primitive constant) => constants.add(constant);
 }