Switch audio synchronization from sleep() based to select() based.

media/audio/audio_input_device.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.
 
 #include "media/audio/audio_input_device.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread_restrictions.h"
@@ skipping 120 matching lines @@
     return;
 
   base::AutoLock auto_lock(audio_thread_lock_);
   // TODO(miu): See TODO in OnStreamCreated method for AudioOutputDevice.
   // Interface changes need to be made; likely, after AudioInputDevice is merged
   // into AudioOutputDevice (http://crbug.com/179597).
   if (stopping_hack_)
     return;
 
   DCHECK(audio_thread_.IsStopped());
-  audio_callback_.reset(
-      new AudioInputDevice::AudioThreadCallback(
-          audio_parameters_, handle, length, total_segments, callback_));
-  audio_thread_.Start(audio_callback_.get(), socket_handle, "AudioInputDevice");
+  audio_callback_.reset(new AudioInputDevice::AudioThreadCallback(
+      audio_parameters_, handle, length, total_segments, callback_));
+  audio_thread_.Start(
+      audio_callback_.get(), socket_handle, "AudioInputDevice", false);
 
   state_ = RECORDING;
   ipc_->RecordStream();
 }
 
 void AudioInputDevice::OnVolume(double volume) {
   NOTIMPLEMENTED();
 }
 
 void AudioInputDevice::OnStateChanged(
@@ skipping 154 matching lines @@
   // with nominal range -1.0 -> +1.0.
   audio_bus_->FromInterleaved(memory, audio_bus_->frames(), bytes_per_sample);
 
   // Deliver captured data to the client in floating point format
   // and update the audio-delay measurement.
   capture_callback_->Capture(
       audio_bus_.get(), audio_delay_milliseconds, volume, key_pressed);
 }
 
 }  // namespace media