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

net/quic/core/quic_crypto_server_stream.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_QUIC_QUIC_CRYPTO_SERVER_STREAM_H_
 #define NET_QUIC_QUIC_CRYPTO_SERVER_STREAM_H_
 
 #include <cstdint>
 #include <memory>
 #include <string>
@@ skipping 106 matching lines @@
   uint8_t NumHandshakeMessagesWithServerNonces() const override;
   int NumServerConfigUpdateMessagesSent() const override;
   const CachedNetworkParameters* PreviousCachedNetworkParams() const override;
   bool UseStatelessRejectsIfPeerSupported() const override;
   bool PeerSupportsStatelessRejects() const override;
   void SetPeerSupportsStatelessRejects(
       bool peer_supports_stateless_rejects) override;
   void SetPreviousCachedNetworkParams(
       CachedNetworkParameters cached_network_params) override;
 
+  // NOTE: Indicating that the Expect-CT header should be sent here presents
+  // a layering violation to some extent. The Expect-CT header only applies to
+  // HTTP connections, while this class can be used for non-HTTP applications.
+  // However, it is exposed here because that is the only place where the
+  // configuration for the certificate used in the connection is accessible.
+  bool ShouldSendExpectCTHeader() const {
+    return signed_config_->send_expect_ct_header;
+  }
+
  protected:
   virtual void ProcessClientHello(
       scoped_refptr<ValidateClientHelloResultCallback::Result> result,
       std::unique_ptr<ProofSource::Details> proof_source_details,
       std::unique_ptr<ProcessClientHelloResultCallback> done_cb);
 
   // Hook that allows the server to set QuicConfig defaults just
   // before going through the parameter negotiation step.
   virtual void OverrideQuicConfigDefaults(QuicConfig* config);
 
@@ skipping 133 matching lines @@
   // ProcessClientHello and forward it to
   // FinishProcessingHandshakeMessageAfterProcessClientHello.
   ProcessClientHelloCallback* process_client_hello_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicCryptoServerStream);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CRYPTO_SERVER_STREAM_H_