Add AudioDirectiveHandler timed tests.

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 "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/time/time.h"
+
+namespace base {
+class TickClock;
+}
+
+namespace copresence {
+
+class TickClockRefCounted
+    : public base::RefCountedThreadSafe<TickClockRefCounted> {
+ public:
+  explicit TickClockRefCounted(scoped_ptr<base::TickClock> clock);
+  base::TimeTicks NowTicks();
+
+ private:
+  friend class base::RefCountedThreadSafe<TickClockRefCounted>;
+  virtual ~TickClockRefCounted();
+
+  scoped_ptr<base::TickClock> clock_;
+
+  DISALLOW_COPY_AND_ASSIGN(TickClockRefCounted);
+};
+
+}  // namespace copresence
+
+#endif  // COMPONENTS_COPRESENCE_HANDLERS_AUDIO_TICK_CLOCK_REF_COUNTED_H_