Run closed_world2_test using the normal compiler pipeline.

tests/compiler/dart2js/compiler_helper.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 compiler_helper;
 
 import 'dart:async';
 import "package:expect/expect.dart";
 
 import 'package:compiler/compiler_new.dart';
 
-import 'package:compiler/src/elements/elements.dart' as lego;
+import 'package:compiler/src/elements/elements.dart';
 export 'package:compiler/src/elements/elements.dart';
 
 import 'package:compiler/src/js_backend/js_backend.dart' as js;
 
 import 'package:compiler/src/commandline_options.dart';
 import 'package:compiler/src/common/codegen.dart';
 import 'package:compiler/src/common/resolution.dart';
 
 export 'package:compiler/src/diagnostics/messages.dart';
 export 'package:compiler/src/diagnostics/source_span.dart';
 export 'package:compiler/src/diagnostics/spannable.dart';
 
-import 'package:compiler/src/types/types.dart' as types;
 export 'package:compiler/src/types/types.dart' show TypeMask;
 
 import 'package:compiler/src/util/util.dart';
 export 'package:compiler/src/util/util.dart';
 
 import 'package:compiler/src/compiler.dart' show Compiler;
 
 export 'package:compiler/src/tree/tree.dart';
 
 import 'mock_compiler.dart';
@@ skipping 28 matching lines @@
         enableTypeAssertions: enableTypeAssertions,
         // Type inference does not run when manually
         // compiling a method.
         disableTypeInference: true,
         enableMinification: minify,
         disableInlining: disableInlining,
         trustJSInteropTypeAnnotations: trustJSInteropTypeAnnotations,
         outputProvider: outputCollector);
     await compiler.init();
     compiler.parseScript(code);
-    lego.Element element = compiler.mainApp.find(entry);
+    LibraryElement mainApp = compiler.mainApp;
+    MethodElement element = mainApp.find(entry);
     if (element == null) return null;
     compiler.phase = Compiler.PHASE_RESOLVING;
     compiler.processQueue(compiler.enqueuer.resolution, element,
         compiler.libraryLoader.libraries);
     ResolutionWorkItem resolutionWork =
         new ResolutionWorkItem(compiler.resolution, element);
     resolutionWork.run();
     compiler.closeResolution();
     CodegenWorkItem work = new CodegenWorkItem(compiler.backend, element);
     compiler.phase = Compiler.PHASE_COMPILING;
@@ skipping 29 matching lines @@
     } else {
       source = {'main.dart': code};
     }
 
     CompilationResult result = await runCompiler(
         memorySourceFiles: source,
         options: options,
         outputProvider: outputCollector);
     Expect.isTrue(result.isSuccess);
     Compiler compiler = result.compiler;
-    lego.Element element = compiler.mainApp.find(entry);
+    LibraryElement mainApp = compiler.mainApp;
+    Element element = mainApp.find(entry);
     js.JavaScriptBackend backend = compiler.backend;
     String generated = backend.getGeneratedCode(element);
     if (check != null) {
       check(generated);
     }
     return returnAll ? outputCollector.getOutput('', OutputType.js) : generated;
   }
 }
 
 Future<String> compileAll(String code,
@@ skipping 16 matching lines @@
   compiler.diagnosticHandler = createHandler(compiler, code);
   return compiler.run(uri).then((compilationSucceded) {
     Expect.isTrue(
         compilationSucceded,
         'Unexpected compilation error(s): '
         '${compiler.diagnosticCollector.errors}');
     return outputCollector.getOutput('', OutputType.js);
   });
 }
 
-Future analyzeAndCheck(String code, String name,
-    check(MockCompiler compiler, lego.Element element),
+Future analyzeAndCheck(
+    String code, String name, check(MockCompiler compiler, Element element),
     {int expectedErrors, int expectedWarnings}) {
   Uri uri = new Uri(scheme: 'source');
   MockCompiler compiler = compilerFor(code, uri,
       expectedErrors: expectedErrors,
       expectedWarnings: expectedWarnings,
       analyzeOnly: true);
   return compiler.run(uri).then((_) {
-    lego.Element element = findElement(compiler, name);
+    Element element = findElement(compiler, name);
     return check(compiler, element);
   });
 }
 
 Future compileSources(
     Map<String, String> sources, check(MockCompiler compiler)) {
   Uri base = new Uri(scheme: 'source', path: '/');
   Uri mainUri = base.resolve('main.dart');
   String mainCode = sources['main.dart'];
   Expect.isNotNull(mainCode, 'No source code found for "main.dart"');
   MockCompiler compiler = compilerFor(mainCode, mainUri);
   sources.forEach((String path, String code) {
     if (path == 'main.dart') return;
     compiler.registerSource(base.resolve(path), code);
   });
 
   return compiler.run(mainUri).then((_) {
     return check(compiler);
   });
 }
 
-lego.Element findElement(compiler, String name, [Uri library]) {
-  lego.LibraryElement lib = compiler.mainApp;
+Element findElement(compiler, String name, [Uri library]) {
+  LibraryElement lib = compiler.mainApp;
   if (library != null) {
     lib = compiler.libraryLoader.lookupLibrary(library);
     Expect.isNotNull(lib, 'Could not locate library $library.');
   }
   var element = lib.find(name);
   Expect.isNotNull(element, 'Could not locate $name.');
   return element;
 }
 
 String anyIdentifier = "[a-zA-Z][a-zA-Z0-9]*";
@@ skipping 88 matching lines @@
     }
   }
 
   return checker;
 }
 
 RegExp _directivePattern = new RegExp(
     //      \1                     \2        \3
     r'''// *(present|absent): *(?:"([^"]*)"|'([^'']*)')''',
     multiLine: true);