Use backend targets to run Kernel transformations in Fasta

pkg/front_end/lib/kernel_generator.dart

Index: pkg/front_end/lib/kernel_generator.dart
diff --git a/pkg/front_end/lib/kernel_generator.dart b/pkg/front_end/lib/kernel_generator.dart
index eec59026300a31c26820e2466f6114eaa1247ada..8b06eed933dda2ba6caf3a36493207640670fc60 100644
--- a/pkg/front_end/lib/kernel_generator.dart
+++ b/pkg/front_end/lib/kernel_generator.dart
@@ -53,7 +53,7 @@ Future<Program> kernelForProgram(Uri source, CompilerOptions options) async {
     TranslateUri uriTranslator = await pOptions.getUriTranslator();
 
     var dillTarget =
-        new DillTarget(new Ticker(isVerbose: false), uriTranslator, "vm");
+        new DillTarget(new Ticker(isVerbose: false), uriTranslator, "vm_fasta");
     var summary = await pOptions.sdkSummaryProgram;
     if (summary != null) {
       dillTarget.loader.appendLibraries(summary);
@@ -149,7 +149,7 @@ Future<Program> kernelForBuildUnit(
     TranslateUri uriTranslator = await pOptions.getUriTranslator();
 
     var dillTarget =
-        new DillTarget(new Ticker(isVerbose: false), uriTranslator, "vm");
+        new DillTarget(new Ticker(isVerbose: false), uriTranslator, "vm_fasta");
     var summary = await pOptions.sdkSummaryProgram;
     if (summary != null) {
       dillTarget.loader.appendLibraries(summary);