Privitize WaitTillDataReady() and DataReady().

media/audio/linux/alsa_output.cc

 // Copyright (c) 2012 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.
 //
 // THREAD SAFETY
 //
 // AlsaPcmOutputStream object is *not* thread-safe and should only be used
 // from the audio thread.  We DCHECK on this assumption whenever we can.
 //
 // SEMANTICS OF Close()
@@ skipping 726 matching lines @@
 }
 
 bool AlsaPcmOutputStream::IsOnAudioThread() const {
   return message_loop_ && message_loop_ == base::MessageLoop::current();
 }
 
 int AlsaPcmOutputStream::RunDataCallback(AudioBus* audio_bus,
                                          AudioBuffersState buffers_state) {
   TRACE_EVENT0("audio", "AlsaPcmOutputStream::RunDataCallback");
 
-  if (source_callback_) {
-    source_callback_->WaitTillDataReady();
+  if (source_callback_)
     return source_callback_->OnMoreData(audio_bus, buffers_state);
-  }
 
   return 0;
 }
 
 void AlsaPcmOutputStream::RunErrorCallback(int code) {
   if (source_callback_)
     source_callback_->OnError(this);
 }
 
 // Changes the AudioSourceCallback to proxy calls to.  Pass in NULL to
 // release ownership of the currently registered callback.
 void AlsaPcmOutputStream::set_source_callback(AudioSourceCallback* callback) {
   DCHECK(IsOnAudioThread());
   source_callback_ = callback;
 }
 
 }  // namespace media