Mojo: Use network service to load non-local Mojo Apps.

mojo/services/public/interfaces/network/url_loader.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 "network_error.mojom"
 
 module mojo {
 
 struct URLRequest {
   string url;
-  string method;
+  string method = "GET";
   string[] headers;
   handle<data_pipe_consumer> body;
-  int64 body_length;  // Set to -1 if length is unknown.
-  bool follow_redirects;
+  int64 body_length = 0;  // Set to -1 if length is unknown.
+  bool follow_redirects = false;
+  bool bypass_cache = false;
 };
 
 struct URLResponse {
   string url;
   string[] redirects;  // The sequence of redirected URLs.
   uint32 status_code;
   string status_line;
   string[] headers;
 };
 
@@ skipping 32 matching lines @@
 
   // This method is called when the response body has been successfully
   // downloaded and copied in its entirety to |response_body_stream|.
   //
   // NOTE: Because |response_body_stream| is limited in size, this event may be
   // delayed until |response_body_stream| is consumed.
   OnReceivedEndOfResponseBody();
 };
 
 }