Revert of Pass task runners to AudioManager constructor.

media/audio/alsa/audio_manager_alsa.cc

 // Copyright 2013 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/alsa/audio_manager_alsa.h"
 
 #include <stddef.h>
 
 #include "base/command_line.h"
 #include "base/environment.h"
@@ skipping 68 matching lines @@
 
 // Implementation of AudioManager.
 bool AudioManagerAlsa::HasAudioOutputDevices() {
   return HasAnyAlsaAudioDevice(kStreamPlayback);
 }
 
 bool AudioManagerAlsa::HasAudioInputDevices() {
   return HasAnyAlsaAudioDevice(kStreamCapture);
 }
 
-AudioManagerAlsa::AudioManagerAlsa(
-    scoped_refptr<base::SingleThreadTaskRunner> task_runner,
-    scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner,
-    AudioLogFactory* audio_log_factory)
-    : AudioManagerBase(std::move(task_runner),
-                       std::move(worker_task_runner),
-                       audio_log_factory),
+AudioManagerAlsa::AudioManagerAlsa(AudioLogFactory* audio_log_factory)
+    : AudioManagerBase(audio_log_factory),
       wrapper_(new AlsaWrapper()) {
   SetMaxOutputStreamsAllowed(kMaxOutputStreams);
 }
 
 AudioManagerAlsa::~AudioManagerAlsa() {
   Shutdown();
 }
 
 void AudioManagerAlsa::ShowAudioInputSettings() {
   ShowLinuxAudioInputSettings();
@@ skipping 253 matching lines @@
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kAlsaInputDevice)) {
     device_name = base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
         switches::kAlsaInputDevice);
   }
 
   return new AlsaPcmInputStream(this, device_name, params, wrapper_.get());
 }
 
 }  // namespace media