Fork some more files from the old framework, so that the transition will be easier to perform.

sky/sdk/lib/mojo/net/fetch.dart

Index: sky/sdk/lib/mojo/net/fetch.dart
diff --git a/sky/sdk/lib/framework/net/fetch.dart b/sky/sdk/lib/mojo/net/fetch.dart
similarity index 99%
copy from sky/sdk/lib/framework/net/fetch.dart
copy to sky/sdk/lib/mojo/net/fetch.dart
index a05f2ab0a9db618a3ab31fc3f0d1124590a1a2cd..834112c01e6565ff857d1b3671da8f59e75a8885 100644
--- a/sky/sdk/lib/framework/net/fetch.dart
+++ b/sky/sdk/lib/mojo/net/fetch.dart
@@ -2,15 +2,17 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import '../shell.dart' as shell;
 import 'dart:async';
 import 'dart:typed_data';
+
 import 'package:mojo/core.dart' as core;
 import 'package:mojom/mojo/network_service.mojom.dart';
 import 'package:mojom/mojo/url_loader.mojom.dart';
 import 'package:mojom/mojo/url_request.mojom.dart';
 import 'package:mojom/mojo/url_response.mojom.dart';
 
+import '../shell.dart' as shell;
+
 class Response {
   ByteData body;