Use more entities in program_builder, collector and registry

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 02e9ffc1bcac47cfdb989b18d80483b36683720a..386fb8e972eadfec94168e3c789aeaacd6fa0825 100644
--- a/pkg/compiler/lib/src/js_emitter/code_emitter_task.dart
+++ b/pkg/compiler/lib/src/js_emitter/code_emitter_task.dart
@@ -24,6 +24,7 @@ import 'startup_emitter/emitter.dart' as startup_js_emitter;
 import 'metadata_collector.dart' show MetadataCollector;
 import 'native_emitter.dart' show NativeEmitter;
 import 'type_test_registry.dart' show TypeTestRegistry;
+import 'sorter.dart';
 
 const USE_LAZY_EMITTER = const bool.fromEnvironment("dart2js.use.lazy.emitter");
 
@@ -72,6 +73,11 @@ class CodeEmitterTask extends CompilerTask {
     return _emitter;
   }
 
+  /// Returns the [Sorter] use for ordering elements in the generated
+  /// JavaScript.
+  // TODO(johnniwinther): Switch this based on the used entity model.
+  Sorter get sorter => const ElementSorter();
+
   String get name => 'Code emitter';
 
   /// Returns true, if the emitter supports reflection.
@@ -176,6 +182,7 @@ class CodeEmitterTask extends CompilerTask {
       _finalizeRti();
       ProgramBuilder programBuilder = new ProgramBuilder(
           compiler.options,
+          compiler.elementEnvironment,
           compiler.commonElements,
           compiler.types,
           compiler.deferredLoadTask,