Deleting the copresence API.

components/copresence/handlers/audio/tick_clock_ref_counted.h

-// Copyright 2014 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 COMPONENTS_COPRESENCE_HANDLERS_AUDIO_TICK_CLOCK_REF_COUNTED_H_
-#define COMPONENTS_COPRESENCE_HANDLERS_AUDIO_TICK_CLOCK_REF_COUNTED_H_
-
-#include <memory>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-
-namespace base {
-class TickClock;
-class TimeTicks;
-}
-
-namespace copresence {
-
-class TickClockRefCounted
-    : public base::RefCountedThreadSafe<TickClockRefCounted> {
- public:
-  explicit TickClockRefCounted(std::unique_ptr<base::TickClock> clock);
-
-  // Takes ownership of the clock.
-  explicit TickClockRefCounted(base::TickClock* clock);
-
-  base::TimeTicks NowTicks() const;
-
- private:
-  friend class base::RefCountedThreadSafe<TickClockRefCounted>;
-  virtual ~TickClockRefCounted();
-
-  std::unique_ptr<base::TickClock> clock_;
-
-  DISALLOW_COPY_AND_ASSIGN(TickClockRefCounted);
-};
-
-}  // namespace copresence
-
-#endif  // COMPONENTS_COPRESENCE_HANDLERS_AUDIO_TICK_CLOCK_REF_COUNTED_H_