Dart: Futures -> Callbacks.

mojo/dart/packages/mojo/lib/mojo/url_response.mojom.dart

Index: mojo/dart/packages/mojo/lib/mojo/url_response.mojom.dart
diff --git a/mojo/dart/packages/mojo/lib/mojo/url_response.mojom.dart b/mojo/dart/packages/mojo/lib/mojo/url_response.mojom.dart
index 0a004002a4682cb1eb9b63a8479b4a09f8eaf727..7cd5f768aacd6bc5e6a8f13c73e544293d299a29 100644
--- a/mojo/dart/packages/mojo/lib/mojo/url_response.mojom.dart
+++ b/mojo/dart/packages/mojo/lib/mojo/url_response.mojom.dart
@@ -29,6 +29,20 @@ class UrlResponse extends bindings.Struct {
 
   UrlResponse() : super(kVersions.last.size);
 
+  UrlResponse.init(
+    network_error_mojom.NetworkError this.error, 
+    core.MojoDataPipeConsumer this.body, 
+    int this.statusCode, 
+    String this.url, 
+    String this.statusLine, 
+    List<http_header_mojom.HttpHeader> this.headers, 
+    String this.mimeType, 
+    String this.charset, 
+    String this.redirectMethod, 
+    String this.redirectUrl, 
+    String this.redirectReferrer
+  ) : super(kVersions.last.size);
+
   static UrlResponse deserialize(bindings.Message message) {
     var decoder = new bindings.Decoder(message);
     var result = decode(decoder);