Serialize also canonical names of 'interfaceTargetReference'.

pkg/front_end/test/incremental_kernel_generator_test.dart

 // Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
 
 import 'package:front_end/compiler_options.dart';
 import 'package:front_end/incremental_kernel_generator.dart';
 import 'package:front_end/memory_file_system.dart';
 import 'package:front_end/src/incremental/byte_store.dart';
@@ skipping 312 matching lines @@
   test_limited_ast_to_binary() async {
     writeFile('/test/.packages', 'test:lib/');
     String aPath = '/test/lib/a.dart';
     String bPath = '/test/lib/b.dart';
     writeFile(
         aPath,
         r'''
 int topField = 0;
 int get topGetter => 0;
 int topFunction({p}) => 0;
+
+abstract class I {
+  int interfaceField;
+  int get interfaceGetter;
+  int interfaceMethod();
+}
         
-class A {
+class A implements I {
   static int staticField;
   static int get staticGetter => 0;
   static int staticMethod() => 0;
 
   int instanceField;
   int get instanceGetter => 0;
   int instanceMethod() => 0;
+
+  int interfaceField;
+  int get interfaceGetter => 0;
+  int interfaceMethod() => 0;
   
   A();
   A.named();
 }
 ''');
     Uri bUri = writeFile(
         bPath,
         r'''
 import 'a.dart';
 
 class B extends A {
   B() : super();
   B.named() : super.named();
   
   void foo() {
     super.instanceMethod();
     instanceMethod();
+    
+    super.interfaceField;
+    super.interfaceField = 0;
+    super.interfaceGetter;
+    super.interfaceMethod();
   }
   
   int instanceMethod() => 0;
+  
+  int interfaceField;
+  int get interfaceGetter => 0;
+  int interfaceMethod() => 0;
 }
 
 main() {
   topField;
   topField = 0;
   var v1 = topGetter;
   var v2 = topFunction(p: 0);
 
   A.staticField;
   A.staticField = 0;
   var v3 = A.staticGetter;
   var v4 = A.staticMethod();
 
   var a = new A();
+
   a.instanceField;
   a.instanceField = 0;
   var v5 = a.instanceGetter;
   var v6 = a.instanceMethod();
+
+  a.interfaceField;
+  a.interfaceField = 0;
+  var v7 = a.interfaceGetter;
+  var v8 = a.interfaceMethod();
 }
 ''');
 
     Program program = await getInitialState(bUri);
 
     String initialKernelText;
     List<int> bytes;
     {
       Library initialLibrary = _getLibrary(program, bUri);
       initialKernelText = _getLibraryText(initialLibrary);
@@ skipping 268 matching lines @@
     throw fail('No library found with URI "$uri"');
   }
 
   String _getLibraryText(Library library) {
     StringBuffer buffer = new StringBuffer();
     new Printer(buffer, syntheticNames: new NameSystem())
         .writeLibraryFile(library);
     return buffer.toString();
   }
 }