Refactoring AudioDirectiveHandler to support testing

components/copresence/handlers/audio/tick_clock_ref_counted.cc

Index: components/copresence/handlers/audio/tick_clock_ref_counted.cc
diff --git a/components/copresence/handlers/audio/tick_clock_ref_counted.cc b/components/copresence/handlers/audio/tick_clock_ref_counted.cc
index 3e7e28d3f5d9c2c4fbe81f12e0c8da3c39f61676..eb84125cadf2b4e1809857838c87df91fddc2f8b 100644
--- a/components/copresence/handlers/audio/tick_clock_ref_counted.cc
+++ b/components/copresence/handlers/audio/tick_clock_ref_counted.cc
@@ -9,14 +9,15 @@
 namespace copresence {
 
 TickClockRefCounted::TickClockRefCounted(scoped_ptr<base::TickClock> clock)
-    : clock_(clock.Pass()) {
-}
+    : clock_(clock.Pass()) {}
+
+TickClockRefCounted::TickClockRefCounted(base::TickClock* clock)
+    : clock_(make_scoped_ptr(clock)) {}
 
-base::TimeTicks TickClockRefCounted::NowTicks() {
+base::TimeTicks TickClockRefCounted::NowTicks() const {
   return clock_->NowTicks();
 }
 
-TickClockRefCounted::~TickClockRefCounted() {
-}
+TickClockRefCounted::~TickClockRefCounted() {}
 
 }  // namespace copresence