Release read buffer of QuicCryptoStream when incoming message become less frequent. Protected by --…

net/quic/test_tools/reliable_quic_stream_peer.h

Index: net/quic/test_tools/reliable_quic_stream_peer.h
diff --git a/net/quic/test_tools/reliable_quic_stream_peer.h b/net/quic/test_tools/reliable_quic_stream_peer.h
index c53ab7aa1a0e67e2fa9d8a5a4093405914ecf322..522049e09fa645c69400612b8dd296db46f3fd81 100644
--- a/net/quic/test_tools/reliable_quic_stream_peer.h
+++ b/net/quic/test_tools/reliable_quic_stream_peer.h
@@ -10,6 +10,7 @@
 #include "base/macros.h"
 #include "base/strings/string_piece.h"
 #include "net/quic/core/quic_protocol.h"
+#include "net/quic/core/quic_stream_sequencer.h"
 
 namespace net {
 
@@ -44,6 +45,8 @@ class ReliableQuicStreamPeer {
       bool fin,
       QuicAckListenerInterface* ack_notifier_delegate);
 
+  static net::QuicStreamSequencer* sequencer(ReliableQuicStream* stream);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(ReliableQuicStreamPeer);
 };