Protected by FLAGS_enable_quic_stateless_reject_support. Add support

net/tools/quic/quic_server_session.h

Index: net/tools/quic/quic_server_session.h
diff --git a/net/tools/quic/quic_server_session.h b/net/tools/quic/quic_server_session.h
index 5cd6dfd8d34e9470f0f031cee1c291d5babce078..dc63341815aa2e1b295ade204480e2c726851f28 100644
--- a/net/tools/quic/quic_server_session.h
+++ b/net/tools/quic/quic_server_session.h
@@ -76,10 +76,31 @@ class QuicServerSession : public QuicSession {
   // Override base class to process FEC config received from client.
   void OnConfigNegotiated() override;
 
+  bool UsingStatelessRejectsIfPeerSupported() {
+    if (GetCryptoStream() == nullptr) {
+      return false;
+    }
+    return GetCryptoStream()->use_stateless_rejects_if_peer_supported();
+  }
+
+  bool PeerSupportsStatelessRejects() {
+    if (GetCryptoStream() == nullptr) {
+      return false;
+    }
+    return GetCryptoStream()->peer_supports_stateless_rejects();
+  }
+
   void set_serving_region(std::string serving_region) {
     serving_region_ = serving_region;
   }
 
+  void set_use_stateless_rejects_if_peer_supported(
+      bool use_stateless_rejects_if_peer_supported) {
+    DCHECK(GetCryptoStream() != nullptr);
+    GetCryptoStream()->set_use_stateless_rejects_if_peer_supported(
+        use_stateless_rejects_if_peer_supported);
+  }
+
  protected:
   // QuicSession methods:
   QuicDataStream* CreateIncomingDataStream(QuicStreamId id) override;