Use backend targets to run Kernel transformations in Fasta

pkg/kernel/lib/target/flutter.dart

Index: pkg/kernel/lib/target/flutter.dart
diff --git a/pkg/kernel/lib/target/flutter.dart b/pkg/kernel/lib/target/flutter.dart
index d5d0996e20666bb3a16cae0ae36675998a11cd11..f59beb9b771b829296d5fa3fe24706fd34daa8c6 100644
--- a/pkg/kernel/lib/target/flutter.dart
+++ b/pkg/kernel/lib/target/flutter.dart
@@ -50,11 +50,14 @@ class FlutterTarget extends Target {
         'dart:vmservice_sky',
       ];
 
-  void performModularTransformations(CoreTypes coreTypes, Program program) {
-    mix.transformLibraries(this, coreTypes, program.libraries);
+  void performModularTransformationsOnLibraries(
+      CoreTypes coreTypes, List<Library> libraries,
+      {void logger(String msg)}) {
+    mix.transformLibraries(this, coreTypes, libraries);
   }
 
-  void performGlobalTransformations(CoreTypes coreTypes, Program program) {
+  void performGlobalTransformations(CoreTypes coreTypes, Program program,
+      {void logger(String msg)}) {
     cont.transformProgram(coreTypes, program);
 
     // Repair `_getMainClosure()` function in dart:{_builtin,ui} libraries.