Switching AudioInputDeviceManager 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 97 matching lines @@
 
 AudioParameters MockAudioManager::GetInputStreamParameters(
     const std::string& device_id) {
   DCHECK(GetTaskRunner()->BelongsToCurrentThread());
   return input_params_;
 }
 
 std::string MockAudioManager::GetAssociatedOutputDeviceID(
     const std::string& input_device_id) {
   DCHECK(GetTaskRunner()->BelongsToCurrentThread());
-  return std::string();
+  return get_associated_output_device_id_cb_.is_null()
+             ? std::string()
+             : get_associated_output_device_id_cb_.Run(input_device_id);
 }
 
 std::unique_ptr<AudioLog> MockAudioManager::CreateAudioLog(
     AudioLogFactory::AudioComponent component) {
   return nullptr;
 }
 
 void MockAudioManager::InitializeOutputDebugRecording(
     scoped_refptr<base::SingleThreadTaskRunner> file_task_runner) {}
 
@@ skipping 31 matching lines @@
 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);
 }
 
+void MockAudioManager::SetAssociatedOutputDeviceIDCallback(
+    GetAssociatedOutputDeviceIDCallback callback) {
+  get_associated_output_device_id_cb_ = std::move(callback);
+}
+
 }  // namespace media.