Refactoring to share MockAudioOutputStream implementations across 3 platforms...

media/audio/mac/audio_output_mac.cc

 // Copyright (c) 2009 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 "media/audio/mac/audio_manager_mac.h"
 #include "media/audio/mac/audio_output_mac.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 
@@ skipping 127 matching lines @@
 void PCMQueueOutAudioOutputStream::SetVolume(double left_level,
                                              double right_level) {
   // TODO(cpu): Implement.
 }
 
 void PCMQueueOutAudioOutputStream::GetVolume(double* left_level,
                                              double* right_level) {
   // TODO(cpu): Implement.
 }
 
-size_t PCMQueueOutAudioOutputStream::GetNumBuffers() {
-  return kNumBuffers;
-}
-
 // Note to future hackers of this function: Do not add locks here because we
 // call out to third party source that might do crazy things including adquire
 // external locks or somehow re-enter here because its legal for them to call
 // some audio functions.
 void PCMQueueOutAudioOutputStream::RenderCallback(void* p_this,
                                                   AudioQueueRef queue,
                                                   AudioQueueBufferRef buffer) {
   PCMQueueOutAudioOutputStream* audio_stream =
       static_cast<PCMQueueOutAudioOutputStream*>(p_this);
   // Call the audio source to fill the free buffer with data. Not having a
@@ skipping 40 matching lines @@
   // Queue the buffers to the audio driver, sounds starts now.
   for(size_t ix = 0; ix != kNumBuffers; ++ix) {
     err = AudioQueueEnqueueBuffer(audio_queue_, buffer_[ix], 0, NULL);
     if (err != noErr) {
       HandleError(err);
       return;
     }
   }
 }