Dart: Futures -> Callbacks.

mojo/dart/packages/mojo/lib/mojo/url_request.mojom.dart

 // WARNING: DO NOT EDIT. This file was generated by a program.
 // See $MOJO_SDK/tools/bindings/mojom_bindings_generator.py.
 
 library url_request_mojom;
 import 'package:mojo/bindings.dart' as bindings;
 import 'package:mojo/core.dart' as core;
 
 import 'package:mojo/mojo/http_header.mojom.dart' as http_header_mojom;
 
 
@@ skipping 64 matching lines @@
   String url = null;
   String method = "GET";
   List<http_header_mojom.HttpHeader> headers = null;
   List<core.MojoDataPipeConsumer> body = null;
   int responseBodyBufferSize = 0;
   bool autoFollowRedirects = false;
   UrlRequestCacheMode cacheMode = new UrlRequestCacheMode(0);
 
   UrlRequest() : super(kVersions.last.size);
 
+  UrlRequest.init(
+    String this.url, 
+    String this.method, 
+    List<http_header_mojom.HttpHeader> this.headers, 
+    List<core.MojoDataPipeConsumer> this.body, 
+    int this.responseBodyBufferSize, 
+    bool this.autoFollowRedirects, 
+    UrlRequestCacheMode this.cacheMode
+  ) : super(kVersions.last.size);
+
   static UrlRequest deserialize(bindings.Message message) {
     var decoder = new bindings.Decoder(message);
     var result = decode(decoder);
     if (decoder.excessHandles != null) {
       decoder.excessHandles.forEach((h) => h.close());
     }
     return result;
   }
 
   static UrlRequest decode(bindings.Decoder decoder0) {
@@ skipping 138 matching lines @@
   }
 
   Map toJson() {
     throw new bindings.MojoCodecError(
         'Object containing handles cannot be encoded to JSON.');
   }
 }