Move locals and closure classes from kernel/ to js_model/

pkg/compiler/lib/src/js_model/closure.dart

Index: pkg/compiler/lib/src/js_model/closure.dart
diff --git a/pkg/compiler/lib/src/kernel/closure.dart b/pkg/compiler/lib/src/js_model/closure.dart
similarity index 98%
rename from pkg/compiler/lib/src/kernel/closure.dart
rename to pkg/compiler/lib/src/js_model/closure.dart
index 3268808c514a6286d7770947c4a9fca9f136ce17..3ba9ec542cdd60ada05161b50796b654f43bf572 100644
--- a/pkg/compiler/lib/src/kernel/closure.dart
+++ b/pkg/compiler/lib/src/js_model/closure.dart
@@ -7,9 +7,9 @@ import 'package:kernel/ast.dart' as ir;
 import '../closure.dart';
 import '../common/tasks.dart';
 import '../elements/entities.dart';
+import '../kernel/element_map.dart';
 import '../world.dart';
-import 'element_map.dart';
-import 'kernel_backend_strategy.dart';
+import 'locals.dart';
 
 class KernelClosureDataBuilder extends ir.Visitor {
   final KernelToLocalsMap _localsMap;