Fix a bug in [http.BaseRequest.send]'s content length handling.

pkg/http/test/utils.dart

Index: pkg/http/test/utils.dart
diff --git a/pkg/http/test/utils.dart b/pkg/http/test/utils.dart
index 3797bd1b26d02592b2c25b6017a113390795088c..ba516c95886b797ab7f7ff217c7c2a376fffbe4a 100644
--- a/pkg/http/test/utils.dart
+++ b/pkg/http/test/utils.dart
@@ -54,6 +54,14 @@ Future startServer() {
         return;
       }
 
+      if (path == '/no-content-length') {
+        response.statusCode = 200;
+        response.contentLength = -1;
+        response.write('body');
+        response.close();
+        return;
+      }
+
       new ByteStream(request).toBytes().then((requestBodyBytes) {
         var outputEncoding;
         var encodingName = request.uri.queryParameters['response-encoding'];