Introduce JsStrategy skeleton

pkg/compiler/lib/src/resolution/members.dart

 // Copyright (c) 2012, 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.resolution.members;
 
 import 'package:front_end/src/fasta/scanner.dart' show isUserDefinableOperator;
 
 import '../common.dart';
 import '../common/names.dart' show Selectors;
@@ skipping 3704 matching lines @@
     if (!targetSignature.isCompatibleWith(constructorSignature)) {
       assert(!isSubtype);
       registry.registerFeature(Feature.THROW_NO_SUCH_METHOD);
       isValidAsConstant = false;
     }
 
     registry.registerStaticUse(new StaticUse.constructorRedirect(
         redirectionTarget,
         redirectionTarget.enclosingClass.thisType
             .subst(type.typeArguments, targetClass.typeVariables)));
-    if (resolution.commonElements.isSymbolConstructor(enclosingElement)) {
+    if (resolution.commonElements.isSymbolConstructor(constructor)) {
       registry.registerFeature(Feature.SYMBOL_CONSTRUCTOR);
     }
     if (isValidAsConstant) {
       List<String> names = <String>[];
       List<ConstantExpression> arguments = <ConstantExpression>[];
       int index = 0;
       constructorSignature.forEachParameter((ParameterElement parameter) {
         if (parameter.isNamed) {
           String name = parameter.name;
           names.add(name);
@@ skipping 1076 matching lines @@
     }
     return const NoneResult();
   }
 }
 
 /// Looks up [name] in [scope] and unwraps the result.
 Element lookupInScope(
     DiagnosticReporter reporter, Node node, Scope scope, String name) {
   return Elements.unwrap(scope.lookup(name), reporter, node);
 }