Eliminate Launchable. Use Navigator instead.

mojo/services/navigation/navigation.mojom

 // 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 "../public/interfaces/network/url_loader.mojom"
+
 module mojo.navigation {
 
 struct NavigationDetails {
   string url;
+  mojo.URLResponse response;

[Aaron Boodman, 2014/06/18 17:33:00]

I think that these should go in a separate struct, in a separate param.
NavigationDetails will eventually have other information related to the
navigation (disposition, etc). But it will always be present.

I believe that all the request stuff together either will or won't be present,
depending on whether request happened (you can verify with Darin in person if he
is handy).

Also, we will eventually want the URLRequest as well, maybe include it now.

+  handle<data_pipe_consumer> response_body_stream;
+
   // TODO(aa): method, data, etc.
 };
 
 // Applications implement this interface to support navigation of their views
 // by embedders.
 interface Navigator {
   Navigate(uint32 node_id, NavigationDetails details);
 };
 
 }