Don't recreate CoreTypes in transformers. Pass it in.

pkg/kernel/bin/transform.dart

Index: pkg/kernel/bin/transform.dart
diff --git a/pkg/kernel/bin/transform.dart b/pkg/kernel/bin/transform.dart
index 1207e418680cc92422ac848f2932c06d5fc3f198..eb083d27d5ea075f7f7b07f5f952ed5e72b5d8f6 100755
--- a/pkg/kernel/bin/transform.dart
+++ b/pkg/kernel/bin/transform.dart
@@ -7,6 +7,7 @@ import 'dart:async';
 import 'dart:io';
 
 import 'package:args/args.dart';
+import 'package:kernel/core_types.dart';
 import 'package:kernel/kernel.dart';
 import 'package:kernel/transformations/closure_conversion.dart' as closures;
 import 'package:kernel/transformations/continuation.dart' as cont;
@@ -74,22 +75,23 @@ Future<CompilerOutcome> runTransformation(List<String> arguments) async {
       parseProgramRoots(embedderEntryPointManifests);
 
   var program = loadProgramFromBinary(input);
+  var coreTypes = new CoreTypes(program);
   switch (options['transformation']) {
     case 'continuation':
-      program = cont.transformProgram(program);
+      program = cont.transformProgram(coreTypes, program);
       break;
     case 'resolve-mixins':
-      program = mix.transformProgram(program);
+      program = mix.transformProgram(coreTypes, program);
       break;
     case 'closures':
-      program = closures.transformProgram(program);
+      program = closures.transformProgram(coreTypes, program);
       break;
     case 'treeshake':
-      program =
-          treeshaker.transformProgram(program, programRoots: programRoots);
+      program = treeshaker.transformProgram(coreTypes, program,
+          programRoots: programRoots);
       break;
     case 'methodcall':
-      program = method_call.transformProgram(program);
+      program = method_call.transformProgram(coreTypes, program);
       break;
     case 'empty':
       program = empty.transformProgram(program);