Make QuicDispatcher's helper and alarm factory arguments unique_ptrs to make ownership clear.

net/quic/quic_chromium_connection_helper.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.
 //
-// The Chrome-specific helper for QuicConnection which uses
-// a TaskRunner for alarms, and uses a DatagramClientSocket for writing data.
+// The Chrome-specific helper for QuicConnection
 
 #ifndef NET_QUIC_QUIC_CONNECTION_HELPER_H_
 #define NET_QUIC_QUIC_CONNECTION_HELPER_H_
 
 #include <set>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "net/base/ip_endpoint.h"
 #include "net/quic/quic_connection.h"
 #include "net/quic/quic_protocol.h"
 #include "net/quic/quic_simple_buffer_allocator.h"
 #include "net/quic/quic_time.h"
 #include "net/udp/datagram_client_socket.h"
 
 namespace base {
 class TaskRunner;
 }  // namespace base
 
 namespace net {
 
 class QuicClock;
 class QuicRandom;
 
 class NET_EXPORT_PRIVATE QuicChromiumConnectionHelper
     : public QuicConnectionHelperInterface {
  public:
-  QuicChromiumConnectionHelper(base::TaskRunner* task_runner,
-                               const QuicClock* clock,
+  QuicChromiumConnectionHelper(const QuicClock* clock,
                                QuicRandom* random_generator);
   ~QuicChromiumConnectionHelper() override;
 
   // QuicConnectionHelperInterface
   const QuicClock* GetClock() const override;
   QuicRandom* GetRandomGenerator() override;
-  QuicAlarm* CreateAlarm(QuicAlarm::Delegate* delegate) override;
-  QuicArenaScopedPtr<QuicAlarm> CreateAlarm(
-      QuicArenaScopedPtr<QuicAlarm::Delegate> delegate,
-      QuicConnectionArena* arena) override;
   QuicBufferAllocator* GetBufferAllocator() override;
 
  private:
-  base::TaskRunner* task_runner_;
   const QuicClock* clock_;
   QuicRandom* random_generator_;
   SimpleBufferAllocator buffer_allocator_;
   base::WeakPtrFactory<QuicChromiumConnectionHelper> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicChromiumConnectionHelper);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONNECTION_HELPER_H_