Add fnl build target

services/http_server/http_request_parser.cc

Index: services/http_server/http_request_parser.cc
diff --git a/services/http_server/http_request_parser.cc b/services/http_server/http_request_parser.cc
index b5beb0a9fbfdd56df9222d213d58b91a294a99ee..5aff0d01823370dfd69253c4bb7393e596a4a634 100644
--- a/services/http_server/http_request_parser.cc
+++ b/services/http_server/http_request_parser.cc
@@ -139,10 +139,10 @@ HttpRequestParser::ParseResult HttpRequestParser::ParseHeaders() {
 
   // If we ever want to support really large content length (currently pipe max
   // 256 MB), then we'll have to stream data from parser to handler.
-  MojoCreateDataPipeOptions options = {sizeof(MojoCreateDataPipeOptions),
-                                       MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE,
-                                       1,
-                                       declared_content_length};
+  MojoCreateDataPipeOptions options = {
+      sizeof(MojoCreateDataPipeOptions),
+      MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE, 1,
+      static_cast<uint32_t>(declared_content_length)};
   MojoResult result = CreateDataPipe(
       &options, &producer_handle_, &http_request_->body);
   if (result != MOJO_RESULT_OK) {