diff --git a/quic/core/quic_alarm.h b/quic/core/quic_alarm.h
new file mode 100644
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+++ b/quic/core/quic_alarm.h
@@ -0,0 +1,87 @@
+// 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 QUICHE_QUIC_CORE_QUIC_ALARM_H_
+#define QUICHE_QUIC_CORE_QUIC_ALARM_H_
+
+#include "base/macros.h"
+#include "net/third_party/quiche/src/quic/core/quic_arena_scoped_ptr.h"
+#include "net/third_party/quiche/src/quic/core/quic_time.h"
+#include "net/third_party/quiche/src/quic/platform/api/quic_export.h"
+
+namespace quic {
+
+// 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 QUIC_EXPORT_PRIVATE QuicAlarm {
+ public:
+  class QUIC_EXPORT_PRIVATE Delegate {
+   public:
+    virtual ~Delegate() {}
+
+    // Invoked when the alarm fires.
+    virtual void OnAlarm() = 0;
+  };
+
+  explicit QuicAlarm(QuicArenaScopedPtr<Delegate> delegate);
+  QuicAlarm(const QuicAlarm&) = delete;
+  QuicAlarm& operator=(const QuicAlarm&) = delete;
+  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 new_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
+  // delegates OnAlarm method will not be called.
+  void Cancel();
+
+  // Cancels and sets the alarm if the |deadline| is farther from the current
+  // deadline than |granularity|, and otherwise does nothing.  If |deadline| is
+  // not initialized, the alarm is cancelled.
+  void Update(QuicTime new_deadline, QuicTime::Delta granularity);
+
+  // Returns true if |deadline_| has been set to a non-zero time.
+  bool IsSet() const;
+
+  QuicTime deadline() const { return deadline_; }
+
+ protected:
+  // Subclasses implement this method to perform the platform-specific
+  // scheduling of the alarm.  Is called from Set() or Fire(), after the
+  // deadline has been updated.
+  virtual void SetImpl() = 0;
+
+  // Subclasses implement this method to perform the platform-specific
+  // cancelation of the alarm.
+  virtual void CancelImpl() = 0;
+
+  // Subclasses implement this method to perform the platform-specific update of
+  // the alarm if there exists a more optimal implementation than calling
+  // CancelImpl() and SetImpl().
+  virtual void UpdateImpl();
+
+  // 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:
+  QuicArenaScopedPtr<Delegate> delegate_;
+  QuicTime deadline_;
+};
+
+}  // namespace quic
+
+#endif  // QUICHE_QUIC_CORE_QUIC_ALARM_H_