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 eb5eda79811f23c446c213e572802c438b138cff..c5be79888cb644bff51ddaab9e909355f2c50f32 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
@@ -108,7 +108,7 @@ 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();
   }
@@ -642,7 +642,7 @@ class KernelTarget extends TargetImplementation {
   void runLinkTransformations(Program program) {}
 
   void transformMixinApplications() {
-    new MixinFullResolution().transform(_program);
+    new MixinFullResolution(backendTarget).transform(_program);
     ticker.logMs("Transformed mixin applications");
   }