Remove stream_map() access from QuicSession.

PiperOrigin-RevId: 344127077
Change-Id: I4812cb1c853ecf0fd9e2fab237b0eea2797d31b4
diff --git a/quic/test_tools/quic_spdy_session_peer.cc b/quic/test_tools/quic_spdy_session_peer.cc
index 4730ef9..e8dbf71 100644
--- a/quic/test_tools/quic_spdy_session_peer.cc
+++ b/quic/test_tools/quic_spdy_session_peer.cc
@@ -7,6 +7,7 @@
 #include "net/third_party/quiche/src/quic/core/http/quic_spdy_session.h"
 #include "net/third_party/quiche/src/quic/core/qpack/qpack_receive_stream.h"
 #include "net/third_party/quiche/src/quic/core/quic_utils.h"
+#include "net/third_party/quiche/src/quic/test_tools/quic_session_peer.h"
 
 namespace quic {
 namespace test {
@@ -21,7 +22,7 @@
 void QuicSpdySessionPeer::SetHeadersStream(QuicSpdySession* session,
                                            QuicHeadersStream* headers_stream) {
   DCHECK(!VersionUsesHttp3(session->transport_version()));
-  for (auto& it : session->stream_map()) {
+  for (auto& it : QuicSessionPeer::stream_map(session)) {
     if (it.first ==
         QuicUtils::GetHeadersStreamId(session->transport_version())) {
       it.second.reset(headers_stream);