anchor.diff:  
         reader.onLoad.first.then((_) {
           var body = reader.result as Uint8List;
  -        completer.complete(new StreamedResponse(
  -            new ByteStream.fromBytes(body),
  +        completer.complete(new Response(
  +            xhr.responseUrl,
               xhr.status,
  -            contentLength: body.length,
  -            request: request,
  -            headers: xhr.responseHeaders,
  -            reasonPhrase: xhr.statusText));
  +            reasonPhrase: xhr.statusText,
  +            body: new Stream.fromIterable([body]),
  +            headers: xhr.responseHeaders));
         });
   
         reader.onError.first.then((error) {
  
positive.code: import 'dart:html';
  import 'dart:typed_data';
  
  import 'package:stack_trace/stack_trace.dart';
  
  import 'src/base_client.dart';
  import 'src/base_request.dart';
  import 'src/byte_stream.dart';
  import 'src/exception.dart';
  import 'src/streamed_response.dart';
  
  // TODO(nweiz): Move this under src/, re-export from lib/http.dart, and use this
  // automatically from [new Client] once sdk#24581 is fixed.
  
negative.code:   /// Creates a new HTTP client.
    BrowserClient();
  
    /// Sends an HTTP request and asynchronously returns the response.
    Future<Response> send(Request request) async {
      var bytes = await collectBytes(request.read());
      var xhr = new HttpRequest();
      _xhrs.add(xhr);
      _openHttpRequest(xhr, request.method, request.url.toString(), asynch: true);
      xhr.responseType = 'blob';
      xhr.withCredentials = request.context['html.withCredentials'] ?? false;
      request.headers.forEach(xhr.setRequestHeader);
  
      var completer = new Completer<Response>();
      xhr.onLoad.first.then((_) {
        // TODO(nweiz): Set the response type to "arraybuffer" when issue 18542
        // is fixed.
  