Issue 22027. When parameters has function type alias type, use its name.

pkg/analysis_server/test/services/correction/fix_test.dart

 // Copyright (c) 2014, 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.
 
 library test.services.correction.fix;
 
 import 'package:analysis_server/src/protocol.dart' hide AnalysisError;
 import 'package:analysis_server/src/services/correction/fix.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/index/local_memory_index.dart';
@@ skipping 751 matching lines @@
 }
 ''');
     assertHasFix(FixKind.CREATE_LOCAL_VARIABLE, '''
 main() {
   int test;
   test += 42;
 }
 ''');
   }
 
-  void test_createMissingOverrides_functionType() {
+  void test_createMissingOverrides_functionTypeAlias() {
+    _indexTestUnit('''
+typedef int Binary(int left, int right);
+
+abstract class Emulator {
+  void performBinary(Binary binary);
+}
+
+class MyEmulator extends Emulator {
+}
+''');
+    assertHasFix(FixKind.CREATE_MISSING_OVERRIDES, '''
+typedef int Binary(int left, int right);
+
+abstract class Emulator {
+  void performBinary(Binary binary);
+}
+
+class MyEmulator extends Emulator {
+  @override
+  void performBinary(Binary binary) {
+    // TODO: implement performBinary
+  }
+}
+''');
+  }
+
+  void test_createMissingOverrides_functionTypedParameter() {
     _indexTestUnit('''
 abstract class A {
   forEach(int f(double p1, String p2));
 }
 
 class B extends A {
 }
 ''');
     assertHasFix(FixKind.CREATE_MISSING_OVERRIDES, '''
 abstract class A {
@@ skipping 1734 matching lines @@
       positions.add(new Position(testFile, offset));
     }
     return positions;
   }
 
   void _indexTestUnit(String code) {
     resolveTestUnit(code);
     index.indexUnit(context, testUnit);
   }
 }