Add AudioDirectiveHandler timed tests.

components/copresence/handlers/audio/tick_clock_ref_counted.cc

+// 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.
+
+#include "components/copresence/handlers/audio/tick_clock_ref_counted.h"
+
+#include "base/time/tick_clock.h"
+
+namespace copresence {
+
+TickClockRefCounted::TickClockRefCounted(scoped_ptr<base::TickClock> clock)
+    : clock_(clock.Pass()) {
+}
+
+base::TimeTicks TickClockRefCounted::NowTicks() {
+  return clock_->NowTicks();
+}
+
+TickClockRefCounted::~TickClockRefCounted() {
+}
+
+}  // namespace copresence