Switching MediaStreamsManager from using AudioManager interface to AudioSystem one.

media/audio/mock_audio_manager.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/mock_audio_manager.h"
 
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
 #include "media/base/audio_parameters.h"
@@ skipping 34 matching lines @@
   DCHECK(GetTaskRunner()->BelongsToCurrentThread());
   return base::string16();
 }
 
 void MockAudioManager::ShowAudioInputSettings() {
 }
 
 void MockAudioManager::GetAudioInputDeviceDescriptions(
     AudioDeviceDescriptions* device_descriptions) {
   DCHECK(GetTaskRunner()->BelongsToCurrentThread());
+  if (get_input_device_descriptions_cb_.is_null())
+    return;
+  get_input_device_descriptions_cb_.Run(device_descriptions);
 }
 
 void MockAudioManager::GetAudioOutputDeviceDescriptions(
     AudioDeviceDescriptions* device_descriptions) {
   DCHECK(GetTaskRunner()->BelongsToCurrentThread());
+  if (get_output_device_descriptions_cb_.is_null())
+    return;
+  get_output_device_descriptions_cb_.Run(device_descriptions);
 }
 
 media::AudioOutputStream* MockAudioManager::MakeAudioOutputStream(
     const media::AudioParameters& params,
     const std::string& device_id,
     const LogCallback& log_callback) {
   NOTREACHED();
   return NULL;
 }
 
@@ skipping 74 matching lines @@
 }
 
 void MockAudioManager::SetHasInputDevices(bool has_input_devices) {
   has_input_devices_ = has_input_devices;
 }
 
 void MockAudioManager::SetHasOutputDevices(bool has_output_devices) {
   has_output_devices_ = has_output_devices;
 }
 
+void MockAudioManager::SetInputDeviceDescriptionsCallback(
+    GetDeviceDescriptionsCallback callback) {
+  get_input_device_descriptions_cb_ = std::move(callback);
+}
+
+void MockAudioManager::SetOutputDeviceDescriptionsCallback(
+    GetDeviceDescriptionsCallback callback) {
+  get_output_device_descriptions_cb_ = std::move(callback);
+}
+
 }  // namespace media.