Move code for instantiating Invocation to Target.

pkg/front_end/lib/src/fasta/kernel/kernel_target.dart

Index: pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
index a85366dcc3d5f3c787bf808e5522155859a0df34..77ded1968b6230e5de4b319db3df5857ee0925ac 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
@@ -110,7 +110,7 @@ class KernelTarget extends TargetImplementation {
       [Map<String, Source> uriToSource])
       : dillTarget = dillTarget,
         uriToSource = uriToSource ?? CompilerContext.current.uriToSource,
-        super(dillTarget.ticker, uriTranslator) {
+        super(dillTarget.ticker, uriTranslator, dillTarget.backendTarget) {
     resetCrashReporting();
     loader = createLoader();
   }
@@ -660,7 +660,7 @@ class KernelTarget extends TargetImplementation {
   }
 
   void transformMixinApplications() {
-    new MixinFullResolution().transform(_program);
+    new MixinFullResolution(backendTarget).transform(_program);
     ticker.logMs("Transformed mixin applications");
   }