Minor refactors to enable sending an Expect-CT header more easily.

net/quic/core/crypto/quic_crypto_server_config.h

Index: net/quic/core/crypto/quic_crypto_server_config.h
diff --git a/net/quic/core/crypto/quic_crypto_server_config.h b/net/quic/core/crypto/quic_crypto_server_config.h
index 2a9cfb0cd27f4feefbca5ebf98c35781ce083361..6ccbbc0e405dd0829a6241bf69281b24d64aa8cc 100644
--- a/net/quic/core/crypto/quic_crypto_server_config.h
+++ b/net/quic/core/crypto/quic_crypto_server_config.h
@@ -860,6 +860,14 @@ struct NET_EXPORT_PRIVATE QuicSignedServerConfig
   // request).
   scoped_refptr<QuicCryptoServerConfig::Config> config;
   std::string primary_scid;
+  // Indication whether the Expect-CT header should be sent on the session
+  // this proof relates to (for background, see
+  // https://www.ietf.org/id/draft-stark-expect-ct-00.txt).
+  // NOTE: This field is intentionally independent from the |cert_sct| one
+  // and can be true even if |cert_sct| is empty.
+  // The goal of the Expect-CT header is uncover cases where valid SCTs are
+  // expected to be served, but aren't.
+  bool send_expect_ct_header;
 
  private:
   friend class base::RefCounted<QuicSignedServerConfig>;