Rename generated file

pkg/analyzer_plugin/tool/spec/codegen_dart_protocol.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:convert';
 
 import 'package:analyzer/src/codegen/tools.dart';
 import 'package:html/dom.dart' as dom;
 
 import 'api.dart';
 import 'codegen_dart.dart';
 import 'from_html.dart';
 import 'implied_types.dart';
 import 'to_html.dart';
 
 /**
  * Special flags that need to be inserted into the declaration of the Element
  * class.
  */
 const Map<String, String> specialElementFlags = const {
   'abstract': '0x01',
   'const': '0x02',
   'final': '0x04',
   'static': '0x08',
   'private': '0x10',
   'deprecated': '0x20'
 };
 
 final GeneratedFile target =
-    new GeneratedFile('lib/protocol/generated_protocol.dart', (String pkgPath) {
+    new GeneratedFile('lib/protocol/protocol_generated.dart', (String pkgPath) {
   CodegenProtocolVisitor visitor = new CodegenProtocolVisitor(readApi(pkgPath));
   return visitor.collectCode(visitor.visitApi);
 });
 
 /**
  * Callback type used to represent arbitrary code generation.
  */
 typedef void CodegenCallback();
 
 typedef String FromJsonSnippetCallback(String jsonPath, String json);
@@ skipping 1232 matching lines @@
 
   @override
   String get asClosure => '($type value) => ${callback('value')}';
 
   @override
   bool get isIdentity => false;
 
   @override
   String asSnippet(String value) => callback(value);
 }