Dart: Fix conversion of identifiers to lowerCamelCase.

examples/dart/netcat/lib/main.dart

 #!mojo mojo:dart_content_handler
 // Copyright 2014 The Chromium Authors. 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 'dart:core';
 import 'dart:typed_data';
 
 import 'package:mojo/application.dart';
 import 'package:mojo/bindings.dart';
 import 'package:mojo/core.dart';
 import 'package:mojo/mojo/network_error.mojom.dart';
 import 'package:mojo_services/mojo/files/file.mojom.dart' as files;
 import 'package:mojo_services/mojo/files/types.mojom.dart' as files;
 import 'package:mojo_services/mojo/net_address.mojom.dart';
 import 'package:mojo_services/mojo/network_service.mojom.dart';
 import 'package:mojo_services/mojo/tcp_bound_socket.mojom.dart';
 import 'package:mojo_services/mojo/tcp_connected_socket.mojom.dart';
 import 'package:mojo_services/mojo/terminal/terminal_client.mojom.dart';
 
 void ignoreFuture(Future f) {
   f.catchError((e) {});
 }
 
 NetAddress makeIPv4NetAddress(List<int> addr, int port) {
   var rv = new NetAddress();
-  rv.family = NetAddressFamily.ipV4;
+  rv.family = NetAddressFamily.ipv4;
   rv.ipv4 = new NetAddressIPv4();
   rv.ipv4.addr = new List<int>.from(addr);
   rv.ipv4.port = port;
   return rv;
 }
 
 void fputs(files.File f, String s) {
   ignoreFuture(f.write((s + '\n').codeUnits, 0, files.Whence.fromCurrent));
 }
 
@@ skipping 194 matching lines @@
 }
 
 main(List args) {
   MojoHandle appHandle = new MojoHandle(args[0]);
   String url = args[1];
   new NetcatApplication.fromHandle(appHandle)
     ..onError = ((Object e) {
       MojoHandle.reportLeakedHandles();
     });
 }