Make media::AudioRenderer inherit from media::TimeSource.

media/base/pipeline.cc

Index: media/base/pipeline.cc
diff --git a/media/base/pipeline.cc b/media/base/pipeline.cc
index e1af61130aa392b5c7d4f00cb5821a4afe861b0d..9d0a45a034bf1301be808a1c8f17fa1b8019a52b 100644
--- a/media/base/pipeline.cc
+++ b/media/base/pipeline.cc
@@ -447,7 +447,7 @@ void Pipeline::DoSeek(
   SerialRunner::Queue bound_fns;
   {
     base::AutoLock auto_lock(lock_);
-    PauseClockAndStopRendering_Locked();
+    PauseClockAndStopTicking_Locked();
   }
 
   // Pause.
@@ -750,7 +750,7 @@ void Pipeline::RunEndedCallbackIfNeeded() {
 
   {
     base::AutoLock auto_lock(lock_);
-    PauseClockAndStopRendering_Locked();
+    PauseClockAndStopTicking_Locked();
     interpolator_->SetBounds(duration_, duration_);
   }
 
@@ -863,7 +863,7 @@ void Pipeline::PausePlayback() {
   DCHECK(task_runner_->BelongsToCurrentThread());
 
   base::AutoLock auto_lock(lock_);
-  PauseClockAndStopRendering_Locked();
+  PauseClockAndStopTicking_Locked();
 }
 
 void Pipeline::StartPlayback() {
@@ -878,7 +878,7 @@ void Pipeline::StartPlayback() {
     // stream, we pause the clock until we receive a valid timestamp.
     base::AutoLock auto_lock(lock_);
     interpolation_state_ = INTERPOLATION_WAITING_FOR_AUDIO_TIME_UPDATE;
-    audio_renderer_->StartRendering();
+    audio_renderer_->StartTicking();
   } else {
     base::AutoLock auto_lock(lock_);
     interpolation_state_ = INTERPOLATION_STARTED;
@@ -887,19 +887,19 @@ void Pipeline::StartPlayback() {
   }
 }
 
-void Pipeline::PauseClockAndStopRendering_Locked() {
+void Pipeline::PauseClockAndStopTicking_Locked() {
   lock_.AssertAcquired();
   switch (interpolation_state_) {
     case INTERPOLATION_STOPPED:
       return;
 
     case INTERPOLATION_WAITING_FOR_AUDIO_TIME_UPDATE:
-      audio_renderer_->StopRendering();
+      audio_renderer_->StopTicking();
       break;
 
     case INTERPOLATION_STARTED:
       if (audio_renderer_)
-        audio_renderer_->StopRendering();
+        audio_renderer_->StopTicking();
       interpolator_->StopInterpolating();
       break;
   }