Make QuicDispatcher's helper argument be a unique_ptr to make ownership

net/tools/quic/quic_dispatcher.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/tools/quic/quic_dispatcher.h"
 
 #include <utility>
 
 #include "base/debug/stack_trace.h"
 #include "base/logging.h"
@@ skipping 23 matching lines @@
 
  private:
   // Not owned.
   QuicDispatcher* dispatcher_;
 
   DISALLOW_COPY_AND_ASSIGN(DeleteSessionsAlarm);
 };
 
 }  // namespace
 
-QuicDispatcher::QuicDispatcher(const QuicConfig& config,
-                               const QuicCryptoServerConfig* crypto_config,
-                               const QuicVersionVector& supported_versions,
-                               QuicConnectionHelperInterface* helper)
+QuicDispatcher::QuicDispatcher(
+    const QuicConfig& config,
+    const QuicCryptoServerConfig* crypto_config,
+    const QuicVersionVector& supported_versions,
+    std::unique_ptr<QuicConnectionHelperInterface> helper)
     : config_(config),
       crypto_config_(crypto_config),
       compressed_certs_cache_(
           QuicCompressedCertsCache::kQuicCompressedCertsCacheSize),
-      helper_(helper),
+      helper_(std::move(helper)),
       delete_sessions_alarm_(
           helper_->CreateAlarm(new DeleteSessionsAlarm(this))),
       supported_versions_(supported_versions),
       current_packet_(nullptr),
       framer_(supported_versions,
               /*unused*/ QuicTime::Zero(),
               Perspective::IS_SERVER),
       last_error_(QUIC_NO_ERROR) {
   framer_.set_visitor(this);
 }
@@ skipping 418 matching lines @@
 
 QuicPacketWriter* QuicDispatcher::CreatePerConnectionWriter() {
   return new QuicPerConnectionPacketWriter(writer_.get());
 }
 
 void QuicDispatcher::SetLastError(QuicErrorCode error) {
   last_error_ = error;
 }
 
 }  // namespace net