Create Namer and Emitter on codegen start.

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

Index: pkg/compiler/lib/src/js_emitter/type_test_registry.dart
diff --git a/pkg/compiler/lib/src/js_emitter/type_test_registry.dart b/pkg/compiler/lib/src/js_emitter/type_test_registry.dart
index c1ff34203557e1a85a88203efec3353f8cfa8f1d..040a4ebcb4f890083d3d14b7e43f7c07255f3b5e 100644
--- a/pkg/compiler/lib/src/js_emitter/type_test_registry.dart
+++ b/pkg/compiler/lib/src/js_emitter/type_test_registry.dart
@@ -37,8 +37,9 @@ class TypeTestRegistry {
   }
 
   final Compiler compiler;
+  final ClosedWorld closedWorld;
 
-  TypeTestRegistry(this.compiler);
+  TypeTestRegistry(this.compiler, this.closedWorld);
 
   JavaScriptBackend get backend => compiler.backend;
 
@@ -105,8 +106,7 @@ class TypeTestRegistry {
         return false;
       } else if (function.isInstanceMember) {
         if (!function.enclosingClass.isClosure) {
-          return compiler.codegenWorld
-              .hasInvokedGetter(function, compiler.closedWorld);
+          return compiler.codegenWorld.hasInvokedGetter(function, closedWorld);
         }
       }
       return false;