Deprecate FLAGS_quic_default_immediate_forward_secure.

net/quic/quic_crypto_server_stream.cc

 // 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.
 
 #include "net/quic/quic_crypto_server_stream.h"
 
 #include <memory>
 
 #include "base/base64.h"
 #include "crypto/secure_hash.h"
@@ skipping 228 matching lines @@
   // HANDSHAKE_MODE in the sent packet manager.
   scoped_refptr<ServerHelloNotifier> server_hello_notifier(
       new ServerHelloNotifier(this));
   SendHandshakeMessage(reply, FLAGS_quic_no_shlo_listener
                                   ? nullptr
                                   : server_hello_notifier.get());
 
   session()->connection()->SetEncrypter(
       ENCRYPTION_FORWARD_SECURE,
       crypto_negotiated_params_.forward_secure_crypters.encrypter.release());
-  if (FLAGS_quic_default_immediate_forward_secure !=
-      config->HasClientSentConnectionOption(kIPFS, Perspective::IS_SERVER)) {
-    session()->connection()->SetDefaultEncryptionLevel(
-        ENCRYPTION_FORWARD_SECURE);
-  }
+  session()->connection()->SetDefaultEncryptionLevel(ENCRYPTION_FORWARD_SECURE);
 
   session()->connection()->SetAlternativeDecrypter(
       ENCRYPTION_FORWARD_SECURE,
       crypto_negotiated_params_.forward_secure_crypters.decrypter.release(),
       false /* don't latch */);
 
   encryption_established_ = true;
   handshake_confirmed_ = true;
   session()->OnCryptoHandshakeEvent(QuicSession::HANDSHAKE_CONFIRMED);
 }
@@ skipping 215 matching lines @@
 QuicConnectionId QuicCryptoServerStream::GenerateConnectionIdForReject(
     QuicConnectionId connection_id) {
   // TODO(rch): Remove this method when
   // reloadable_flag_quic_dispatcher_creates_id2 is removed.
   QuicServerSessionBase* session_base =
       static_cast<QuicServerSessionBase*>(session());
   return session_base->GenerateConnectionIdForReject(connection_id);
 }
 
 }  // namespace net