Use backend targets to run Kernel transformations in Fasta

pkg/kernel/lib/target/vm.dart

Index: pkg/kernel/lib/target/vm.dart
diff --git a/pkg/kernel/lib/target/vm.dart b/pkg/kernel/lib/target/vm.dart
index 03c3f31709422c5b5f53996244774909945d7123..dda09822b735642a5fec34334b1aaf00a5659f09 100644
--- a/pkg/kernel/lib/target/vm.dart
+++ b/pkg/kernel/lib/target/vm.dart
@@ -56,14 +56,17 @@ class VmTarget extends Target {
 
   ClassHierarchy _hierarchy;
 
-  void performModularTransformations(CoreTypes coreTypes, Program program) {
+  void performModularTransformationsOnLibraries(
+      CoreTypes coreTypes, List<Library> libraries,
+      {void logger(String msg)}) {
     var mixins = new mix.MixinFullResolution(this, coreTypes)
-      ..transform(program.libraries);
+      ..transform(libraries);
 
     _hierarchy = mixins.hierarchy;
   }
 
-  void performGlobalTransformations(CoreTypes coreTypes, Program program) {
+  void performGlobalTransformations(CoreTypes coreTypes, Program program,
+      {void logger(String msg)}) {
     if (strongMode) {
       new InsertTypeChecks(coreTypes, hierarchy: _hierarchy)
           .transformProgram(program);