Make the mojom files under //mojo/services/network/interfaces basically the same as the ones in the…

mojo/services/network/interfaces/web_socket.mojom

Index: mojo/services/network/interfaces/web_socket.mojom
diff --git a/mojo/services/network/interfaces/web_socket.mojom b/mojo/services/network/interfaces/web_socket.mojom
index 72c41ffa9194e8c1816d652bce9fdecc8b31a059..f5880352795bac567522b188cc78599a26d31d8b 100644
--- a/mojo/services/network/interfaces/web_socket.mojom
+++ b/mojo/services/network/interfaces/web_socket.mojom
@@ -2,9 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+[DartPackage="mojo_services"]
 module mojo;
 
-import "third_party/mojo/src/mojo/public/interfaces/network/network_error.mojom";
+import "mojo/public/interfaces/network/network_error.mojom";
 
 interface WebSocket {
   enum MessageType {