Less inequivalence on Hello World!

pkg/compiler/lib/src/js_emitter/code_emitter_task.dart

Index: pkg/compiler/lib/src/js_emitter/code_emitter_task.dart
diff --git a/pkg/compiler/lib/src/js_emitter/code_emitter_task.dart b/pkg/compiler/lib/src/js_emitter/code_emitter_task.dart
index c96c4325ee1c457ad9e1bdce16dd820ac697ba27..aa7f04bb81ae43b07afdbac6403e19e48af8ba85 100644
--- a/pkg/compiler/lib/src/js_emitter/code_emitter_task.dart
+++ b/pkg/compiler/lib/src/js_emitter/code_emitter_task.dart
@@ -22,6 +22,7 @@ import 'program_builder/program_builder.dart';
 import 'startup_emitter/emitter.dart' as startup_js_emitter;
 
 import 'metadata_collector.dart' show MetadataCollector;
+import 'model.dart';
 import 'native_emitter.dart' show NativeEmitter;
 import 'type_test_registry.dart' show TypeTestRegistry;
 import 'sorter.dart';
@@ -42,6 +43,8 @@ class CodeEmitterTask extends CompilerTask {
   Emitter _emitter;
   final Compiler compiler;
 
+  ProgramBuilder programForTesting;
+
   /// The [Sorter] use for ordering elements in the generated JavaScript.
   final Sorter sorter;
 
@@ -194,7 +197,7 @@ class CodeEmitterTask extends CompilerTask {
           compiler.reporter,
           closedWorld.elementEnvironment,
           closedWorld.commonElements,
-          compiler.types,
+          closedWorld.dartTypes,
           compiler.deferredLoadTask,
           compiler.backendStrategy.closureDataLookup,
           compiler.codegenWorldBuilder,
@@ -237,6 +240,8 @@ abstract class EmitterFactory {
 }
 
 abstract class Emitter {
+  Program get programForTesting;
+
   /// Uses the [programBuilder] to generate a model of the program, emits
   /// the program, and returns the size of the generated output.
   int emitProgram(ProgramBuilder programBuilder);
@@ -290,6 +295,7 @@ abstract class Emitter {
 }
 
 abstract class EmitterBase implements Emitter {
+  Program programForTesting;
   Namer get namer;
 
   jsAst.PropertyAccess globalPropertyAccessForMember(MemberEntity element) {