Refactored treatment of closure variables in dart2js CPS.

pkg/analyzer2dart/test/sexpr_test.dart

 // Copyright (c) 2014, 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.
 
 /// Unittest test of the CPS ir generated by the analyzer2dart compiler.
 
 import 'mock_sdk.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:compiler/src/cps_ir/cps_ir_nodes_sexpr.dart';
 import 'package:compiler/src/elements/elements.dart' as dart2js;
 import 'package:unittest/unittest.dart';
 
 import '../lib/src/closed_world.dart';
 import '../lib/src/driver.dart';
 import '../lib/src/converted_world.dart';
 import 'output_helper.dart';
 import 'test_helper.dart';
 import 'sexpr_data.dart';
 
 main() {
   performTests(TEST_DATA, unittester, checkResult);
 }
 
 checkResult(TestSpec result) {
+  if (result.skipInAnalyzerFrontend) return;
   String input = result.input.trim();
   CollectingOutputProvider outputProvider = new CollectingOutputProvider();
   MemoryResourceProvider provider = new MemoryResourceProvider();
   DartSdk sdk = new MockSdk();
   Driver driver = new Driver(provider, sdk, outputProvider);
   String rootFile = '/root.dart';
   provider.newFile(rootFile, input);
   Source rootSource = driver.setRoot(rootFile);
   FunctionElement entryPoint = driver.resolveEntryPoint(rootSource);
   ClosedWorld world = driver.computeWorld(entryPoint);
@@ skipping 18 matching lines @@
       convertedWorld.resolvedElements.forEach((dart2js.Element element) {
         if (element.name == elementName &&
             element.library == mainLibrary) {
           checkOutput(element, output);
         }
       });
     });
   }
 }