Change QuicConnection's ScopedPacketBundler to use SEND_QUEUED_ACK instead of NO_ACK, to ensure a q…

net/quic/quic_session.cc

Index: net/quic/quic_session.cc
diff --git a/net/quic/quic_session.cc b/net/quic/quic_session.cc
index 1d880fedd72638d152a88a47aeaf6172a02b96cb..14edd79255a62447b3715ecd424858093e7270f7 100644
--- a/net/quic/quic_session.cc
+++ b/net/quic/quic_session.cc
@@ -184,8 +184,8 @@ void QuicSession::OnCanWrite() {
     return;
   }
 
-  QuicConnection::ScopedPacketBundler ack_bundler(connection_.get(),
-                                                  QuicConnection::NO_ACK);
+  QuicConnection::ScopedPacketBundler ack_bundler(
+      connection_.get(), QuicConnection::SEND_ACK_IF_QUEUED);
   for (size_t i = 0; i < num_writes; ++i) {
     if (!(write_blocked_streams_.HasWriteBlockedCryptoOrHeadersStream() ||
           write_blocked_streams_.HasWriteBlockedDataStreams())) {