Remove AstFactory from the front end.

pkg/front_end/lib/src/fasta/source/diet_listener.dart

Index: pkg/front_end/lib/src/fasta/source/diet_listener.dart
diff --git a/pkg/front_end/lib/src/fasta/source/diet_listener.dart b/pkg/front_end/lib/src/fasta/source/diet_listener.dart
index 1c55c6ea42041591ca83e1db3a599335e3ad1a0b..ee46b5b1861fc5f6a2959a4f6625f3efa2aa8cce 100644
--- a/pkg/front_end/lib/src/fasta/source/diet_listener.dart
+++ b/pkg/front_end/lib/src/fasta/source/diet_listener.dart
@@ -4,9 +4,6 @@
 
 library fasta.diet_listener;
 
-import 'package:front_end/src/fasta/kernel/kernel_ast_factory.dart'
-    show KernelAstFactory;
-
 import 'package:front_end/src/fasta/type_inference/type_inference_engine.dart'
     show TypeInferenceEngine;
 
@@ -410,18 +407,8 @@ class DietListener extends StackListener {
     var listener = new TypeInferenceListener();
     var typeInferrer =
         typeInferenceEngine.createLocalTypeInferrer(uri, listener);
-    return new BodyBuilder(
-        library,
-        builder,
-        memberScope,
-        formalParameterScope,
-        hierarchy,
-        coreTypes,
-        currentClass,
-        isInstanceMember,
-        uri,
-        typeInferrer,
-        new KernelAstFactory())
+    return new BodyBuilder(library, builder, memberScope, formalParameterScope,
+        hierarchy, coreTypes, currentClass, isInstanceMember, uri, typeInferrer)
       ..constantExpressionRequired = builder.isConstructor && builder.isConst;
   }