Fix a bug where QUIC ack frames were not bundled with crypto stream

net/quic/quic_packet_creator.h

Index: net/quic/quic_packet_creator.h
diff --git a/net/quic/quic_packet_creator.h b/net/quic/quic_packet_creator.h
index d7c942fa7c68a36841730558e2e7467ffb5f99e4..10b8e8883b855955b5faba5f8f2e5a743f25de05 100644
--- a/net/quic/quic_packet_creator.h
+++ b/net/quic/quic_packet_creator.h
@@ -116,6 +116,9 @@ class NET_EXPORT_PRIVATE QuicPacketCreator : public QuicFecBuilderInterface {
   // Returns true if there are frames pending to be serialized.
   bool HasPendingFrames() const;
 
+  // Returns true if there are retransmittable frames pending to be serialized.
+  bool HasPendingRetransmittableFrames() const;
+
   // Returns whether FEC protection is currently enabled. Note: Enabled does not
   // mean that an FEC group is currently active; i.e., IsFecProtected() may
   // still return false.