Dart: Futures -> Callbacks.

mojo/dart/packages/mojo_services/lib/mojo/http_message.mojom.dart

Index: mojo/dart/packages/mojo_services/lib/mojo/http_message.mojom.dart
diff --git a/mojo/dart/packages/mojo_services/lib/mojo/http_message.mojom.dart b/mojo/dart/packages/mojo_services/lib/mojo/http_message.mojom.dart
index 971673ca2c31401b353fbee5a24adac741309504..23c62ee87c0dbd29440952b73280b66da531e566 100644
--- a/mojo/dart/packages/mojo_services/lib/mojo/http_message.mojom.dart
+++ b/mojo/dart/packages/mojo_services/lib/mojo/http_message.mojom.dart
@@ -20,6 +20,13 @@ class HttpRequest extends bindings.Struct {
 
   HttpRequest() : super(kVersions.last.size);
 
+  HttpRequest.init(
+    String this.method, 
+    String this.url, 
+    List<http_header_mojom.HttpHeader> this.headers, 
+    core.MojoDataPipeConsumer this.body
+  ) : super(kVersions.last.size);
+
   static HttpRequest deserialize(bindings.Message message) {
     var decoder = new bindings.Decoder(message);
     var result = decode(decoder);
@@ -147,6 +154,12 @@ class HttpResponse extends bindings.Struct {
 
   HttpResponse() : super(kVersions.last.size);
 
+  HttpResponse.init(
+    int this.statusCode, 
+    core.MojoDataPipeConsumer this.body, 
+    List<http_header_mojom.HttpHeader> this.headers
+  ) : super(kVersions.last.size);
+
   static HttpResponse deserialize(bindings.Message message) {
     var decoder = new bindings.Decoder(message);
     var result = decode(decoder);