Pass a Target instance to DillTarget instead of its name

pkg/kernel/test/closures/suite.dart

Index: pkg/kernel/test/closures/suite.dart
diff --git a/pkg/kernel/test/closures/suite.dart b/pkg/kernel/test/closures/suite.dart
index 45bde02a7616b6d827e6d4f53c7c6b7a8038f165..3f66f338c7cbd6eea283e02f268a2fd8c6590e79 100644
--- a/pkg/kernel/test/closures/suite.dart
+++ b/pkg/kernel/test/closures/suite.dart
@@ -41,6 +41,8 @@ import 'package:kernel/kernel.dart' show loadProgramFromBinary;
 
 import 'package:kernel/target/targets.dart' show TargetFlags;
 
+import 'package:kernel/target/vm_fasta.dart' show VmFastaTarget;
+
 const String STRONG_MODE = " strong mode ";
 
 class ClosureConversionContext extends ChainContext {
@@ -101,9 +103,8 @@ class FastaCompile
       TestDescription description, ClosureConversionContext context) async {
     Program platform = await context.loadPlatform();
     Ticker ticker = new Ticker();
-    DillTarget dillTarget = new DillTarget(
-        ticker, context.uriTranslator, "vm_fasta",
-        flags: new TargetFlags(strongMode: context.strongMode));
+    DillTarget dillTarget = new DillTarget(ticker, context.uriTranslator,
+        new VmFastaTarget(new TargetFlags(strongMode: context.strongMode)));
     platform.unbindCanonicalNames();
     dillTarget.loader.appendLibraries(platform);
     KernelTarget sourceTarget = new KernelTarget(