Remove dependency on headers stream from QuicSession.

net/quic/quic_reliable_client_stream.h

Index: net/quic/quic_reliable_client_stream.h
diff --git a/net/quic/quic_reliable_client_stream.h b/net/quic/quic_reliable_client_stream.h
index 48f5cc91ef729df99bca4725d0bd1d3ae42a055e..7221a6ad8c144fabfb637bc4311102f6dc3a4d04 100644
--- a/net/quic/quic_reliable_client_stream.h
+++ b/net/quic/quic_reliable_client_stream.h
@@ -16,7 +16,7 @@
 
 namespace net {
 
-class QuicClientSession;
+class QuicSpdySession;
 
 // A client-initiated ReliableQuicStream.  Instances of this class
 // are owned by the QuicClientSession which created them.
@@ -48,7 +48,7 @@ class NET_EXPORT_PRIVATE QuicReliableClientStream : public QuicDataStream {
   };
 
   QuicReliableClientStream(QuicStreamId id,
-                           QuicSession* session,
+                           QuicSpdySession* session,
                            const BoundNetLog& net_log);
 
   ~QuicReliableClientStream() override;