Merge GetOrCreateDynamicStream() into GetOrCreateStream().

GetOrCreateDynamicStream() no longer guarantees that the returned stream is non-static. And since we have a single stream map for all streams, we can just have one method.

gfe-relnote: Protected by quic_inline_getorcreatedynamicstream.
PiperOrigin-RevId: 258426677
Change-Id: I89ac704a44da79afce3c1704efd5d721c9585f32
diff --git a/quic/test_tools/quic_session_peer.h b/quic/test_tools/quic_session_peer.h
index 9ca8530..f027eb5 100644
--- a/quic/test_tools/quic_session_peer.h
+++ b/quic/test_tools/quic_session_peer.h
@@ -52,8 +52,8 @@
 
   static QuicCryptoStream* GetMutableCryptoStream(QuicSession* session);
   static QuicWriteBlockedList* GetWriteBlockedStreams(QuicSession* session);
-  static QuicStream* GetOrCreateDynamicStream(QuicSession* session,
-                                              QuicStreamId stream_id);
+  static QuicStream* GetOrCreateStream(QuicSession* session,
+                                       QuicStreamId stream_id);
   static std::map<QuicStreamId, QuicStreamOffset>&
   GetLocallyClosedStreamsHighestOffset(QuicSession* session);
   static QuicSession::StreamMap& stream_map(QuicSession* session);