Run closed_world2_test using the normal compiler pipeline.

pkg/compiler/lib/src/kernel/kernel_strategy.dart

Index: pkg/compiler/lib/src/kernel/kernel_strategy.dart
diff --git a/pkg/compiler/lib/src/kernel/kernel_strategy.dart b/pkg/compiler/lib/src/kernel/kernel_strategy.dart
index edc555f66bf5aa125896d9a4a520563881c93499..6269627a97b87ec5f7c26cda96c5b609bb7a8e76 100644
--- a/pkg/compiler/lib/src/kernel/kernel_strategy.dart
+++ b/pkg/compiler/lib/src/kernel/kernel_strategy.dart
@@ -67,7 +67,7 @@ class KernelFrontEndStrategy implements FrontEndStrategy {
       _annotationProcesser ??= new KernelAnnotationProcessor(elementMap);
 
   @override
-  NativeClassFinder createNativeClassResolver(NativeBasicData nativeBasicData) {
+  NativeClassFinder createNativeClassFinder(NativeBasicData nativeBasicData) {
     return new BaseNativeClassFinder(elementMap.elementEnvironment,
         elementMap.commonElements, nativeBasicData);
   }
@@ -76,6 +76,13 @@ class KernelFrontEndStrategy implements FrontEndStrategy {
     return new KernelNoSuchMethodResolver(elementMap);
   }
 
+  /// Computes the main function from [mainLibrary] adding additional world
+  /// impact to [impactBuilder].
+  FunctionEntity computeMain(
+      LibraryEntity mainLibrary, WorldImpactBuilder impactBuilder) {
+    return elementEnvironment.mainFunction;
+  }
+
   CustomElementsResolutionAnalysis createCustomElementsResolutionAnalysis(
       NativeBasicData nativeBasicData,
       BackendUsageBuilder backendUsageBuilder) {