Run closed_world2_test using the normal compiler pipeline.

tests/compiler/dart2js/compiler_helper.dart

Index: tests/compiler/dart2js/compiler_helper.dart
diff --git a/tests/compiler/dart2js/compiler_helper.dart b/tests/compiler/dart2js/compiler_helper.dart
index 42ed72aba75acb4b338c8456c94081242532aeb3..c49d1182659f32b0d48689d2c357f6b76cd61cb0 100644
--- a/tests/compiler/dart2js/compiler_helper.dart
+++ b/tests/compiler/dart2js/compiler_helper.dart
@@ -9,7 +9,7 @@ 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;
@@ -22,7 +22,6 @@ 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';
@@ -71,7 +70,8 @@ Future<String> compile(String code,
         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,
@@ -121,7 +121,8 @@ Future<String> compile(String code,
         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) {
@@ -158,8 +159,8 @@ Future<String> compileAll(String code,
   });
 }
 
-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,
@@ -167,7 +168,7 @@ Future analyzeAndCheck(String code, String name,
       expectedWarnings: expectedWarnings,
       analyzeOnly: true);
   return compiler.run(uri).then((_) {
-    lego.Element element = findElement(compiler, name);
+    Element element = findElement(compiler, name);
     return check(compiler, element);
   });
 }
@@ -189,8 +190,8 @@ Future compileSources(
   });
 }
 
-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.');