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 3f2b281cb371a8391819180910d915751b1cd634..7bd96673cda4ed4f25c2c281659d536237f564d6 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
@@ -21,6 +21,13 @@ 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);
@@ -148,6 +155,12 @@ 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);