Apply transformations after comparing to golden files.

pkg/front_end/testcases/mixin.dart.direct.expect

Index: pkg/front_end/testcases/mixin.dart.direct.expect
diff --git a/pkg/front_end/testcases/mixin.dart.direct.expect b/pkg/front_end/testcases/mixin.dart.direct.expect
index 7a39b22c7841cfe8f6faac3182bca8a30caf98a0..2698b68a87d80627bf48854c35acedcccfdfc25b 100644
--- a/pkg/front_end/testcases/mixin.dart.direct.expect
+++ b/pkg/front_end/testcases/mixin.dart.direct.expect
@@ -2,23 +2,13 @@ library;
 import self as self;
 import "dart:core" as core;
 
-abstract class Object&M1 extends core::Object implements self::M1 {
-  constructor •() → void
-    : super core::Object::•()
-    ;
-  method m() → dynamic
-    return core::print("M1");
+abstract class Object&M1 = core::Object with self::M1 {
 }
-abstract class Object&M1&M2 extends self::Object&M1 implements self::M2 {
-  constructor •() → void
-    : super self::Object&M1::•()
-    ;
-  method m() → dynamic
-    return core::print("M2");
+abstract class Object&M1&M2 = self::Object&M1 with self::M2 {
 }
 class B extends self::Object&M1&M2 {
   constructor •(dynamic value) → void
-    : super self::Object&M1&M2::•()
+    : super core::Object::•()
     ;
 }
 abstract class M1 extends core::Object {
@@ -37,7 +27,7 @@ abstract class M2 extends core::Object {
 }
 class C extends self::Object&M1&M2 {
   constructor •(dynamic value) → void
-    : super self::Object&M1&M2::•()
+    : super core::Object::•()
     ;
 }
 abstract class G1<T extends core::Object> extends core::Object {
@@ -47,16 +37,11 @@ abstract class G1<T extends core::Object> extends core::Object {
   method m() → dynamic
     return core::print(self::G1::T);
 }
-abstract class Object&G1^^#T0<#T0 extends core::Object> extends core::Object implements self::G1<self::Object&G1^^#T0::#T0> {
-  constructor •() → void
-    : super core::Object::•()
-    ;
-  method m() → dynamic
-    return core::print(self::Object&G1^^#T0::#T0);
+abstract class Object&G1^^#T0<#T0 extends core::Object> = core::Object with self::G1<self::Object&G1^^#T0::#T0> {
 }
 class D<S extends core::Object> extends self::Object&G1^^#T0<self::D::S> {
   constructor •() → void
-    : super self::Object&G1^^#T0::•()
+    : super core::Object::•()
     ;
 }
 static method main() → dynamic {