Revert of Rename AudioRenderer::Play/Pause() to Start/StopRendering().

media/base/pipeline.cc

Index: media/base/pipeline.cc
diff --git a/media/base/pipeline.cc b/media/base/pipeline.cc
index cb4469bf893ff0934d6dd4e25b176072a1321d6d..841a49bab5bf88796ee2b0fa824daa4c4afde2c1 100644
--- a/media/base/pipeline.cc
+++ b/media/base/pipeline.cc
@@ -197,7 +197,7 @@
     creation_time_ = base::TimeTicks();
   }
 
-  DVLOG(1) << GetStateString(state_) << " -> " << GetStateString(next_state);
+  DVLOG(2) << GetStateString(state_) << " -> " << GetStateString(next_state);
 
   state_ = next_state;
   media_log_->AddEvent(media_log_->CreatePipelineStateChangedEvent(next_state));
@@ -483,6 +483,10 @@
   SerialRunner::Queue bound_fns;
 
   // Pause.
+  if (audio_renderer_) {
+    bound_fns.Push(base::Bind(
+        &AudioRenderer::Pause, base::Unretained(audio_renderer_.get())));
+  }
   if (text_renderer_) {
     bound_fns.Push(base::Bind(
         &TextRenderer::Pause, base::Unretained(text_renderer_.get())));
@@ -753,9 +757,6 @@
 
   // Kick off seeking!
   {
-    if (audio_renderer_)
-      audio_renderer_->StopRendering();
-
     base::AutoLock auto_lock(lock_);
     if (clock_->IsPlaying())
       clock_->Pause();
@@ -927,31 +928,29 @@
 }
 
 void Pipeline::StartWaitingForEnoughData() {
-  DVLOG(1) << __FUNCTION__;
   DCHECK_EQ(state_, kPlaying);
   DCHECK(WaitingForEnoughData());
 
   if (audio_renderer_)
-    audio_renderer_->StopRendering();
+    audio_renderer_->Pause();
 
   base::AutoLock auto_lock(lock_);
   clock_->Pause();
 }
 
 void Pipeline::StartPlayback() {
-  DVLOG(1) << __FUNCTION__;
   DCHECK_EQ(state_, kPlaying);
   DCHECK(!WaitingForEnoughData());
 
   if (audio_renderer_) {
+    audio_renderer_->Play();
+
+    base::AutoLock auto_lock(lock_);
     // We use audio stream to update the clock. So if there is such a
     // stream, we pause the clock until we receive a valid timestamp.
-    base::AutoLock auto_lock(lock_);
     waiting_for_clock_update_ = true;
-    audio_renderer_->StartRendering();
   } else {
     base::AutoLock auto_lock(lock_);
-    DCHECK(!waiting_for_clock_update_);
     clock_->SetMaxTime(clock_->Duration());
     clock_->Play();
   }