QuicAlarms are now allocated out of an arena in QuicConnection

net/quic/quic_alarm.h

 // Copyright 2013 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_ALARM_H_
 #define NET_QUIC_QUIC_ALARM_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "net/base/net_export.h"
+#include "net/quic/quic_arena_scoped_ptr.h"
 #include "net/quic/quic_time.h"
 
 namespace net {
 
 // Abstract class which represents an alarm which will go off at a
 // scheduled time, and execute the |OnAlarm| method of the delegate.
 // An alarm may be cancelled, in which case it may or may not be
 // removed from the underlying scheduling system, but in either case
 // the task will not be executed.
 class NET_EXPORT_PRIVATE QuicAlarm {
  public:
   class NET_EXPORT_PRIVATE Delegate {
    public:
     virtual ~Delegate() {}
 
     // Invoked when the alarm fires.  If the return value is not
     // infinite, then the alarm will be rescheduled at the
     // specified time.
     virtual QuicTime OnAlarm() = 0;
   };
 
-  explicit QuicAlarm(Delegate* delegate);
+  explicit QuicAlarm(QuicArenaScopedPtr<Delegate> delegate);
   virtual ~QuicAlarm();
 
   // Sets the alarm to fire at |deadline|.  Must not be called while
   // the alarm is set.  To reschedule an alarm, call Cancel() first,
   // then Set().
   void Set(QuicTime deadline);
 
   // Cancels the alarm.  May be called repeatedly.  Does not
   // guarantee that the underlying scheduling system will remove
   // the alarm's associated task, but guarantees that the
@@ skipping 22 matching lines @@
   // Called by subclasses when the alarm fires.  Invokes the
   // delegates |OnAlarm| if a delegate is set, and if the deadline
   // has been exceeded.  Implementations which do not remove the
   // alarm from the underlying scheduler on Cancel() may need to handle
   // the situation where the task executes before the deadline has been
   // reached, in which case they need to reschedule the task and must not
   // call invoke this method.
   void Fire();
 
  private:
-  scoped_ptr<Delegate> delegate_;
+  QuicArenaScopedPtr<Delegate> delegate_;
   QuicTime deadline_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicAlarm);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_ALARM_H_