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 <string>
+#include <vector>

[xiyuan, 2014/10/21 21:08:12]

nit: both headers seems not used.

[rkc, 2014/10/22 00:16:57]

Done.

+
+#include "base/callback.h"

[xiyuan, 2014/10/21 21:08:12]

nit: not used?

[rkc, 2014/10/22 00:16:57]

Done.

+#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 BASE_EXPORT TickClockRefCounted

[xiyuan, 2014/10/21 21:08:12]

Is BASE_EXPORT intentional here?

[rkc, 2014/10/22 00:16:57]

Leftover from copying this code from base/timer :)
Removed.
Done.

+    : public base::RefCountedThreadSafe<TickClockRefCounted> {
+ public:
+  explicit TickClockRefCounted(base::TickClock* clock);

[xiyuan, 2014/10/21 21:08:12]

nit: Document ownership or use scoped_ptr<>

[rkc, 2014/10/22 00:16:57]

Makes the test code a bit uglier :)
Done.

+  base::TimeTicks NowTicks();
+
+ private:
+  friend class RefCountedThreadSafe<TickClockRefCounted>;
+  virtual ~TickClockRefCounted();
+
+  scoped_ptr<base::TickClock> clock_;
+};

[xiyuan, 2014/10/21 21:08:12]

nit: DISALLOW_COPY_AND_ASSIGN?

[rkc, 2014/10/22 00:16:57]

Done.

+
+}  // namespace copresence
+
+#endif  // COMPONENTS_COPRESENCE_HANDLERS_AUDIO_TICK_CLOCK_REF_COUNTED_H_