Removing public access to AudioManager device info interface.

media/audio/audio_system_impl.h

 // Copyright 2017 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.
 
 #ifndef MEDIA_AUDIO_AUDIO_SYSTEM_IMPL_H_
 #define MEDIA_AUDIO_AUDIO_SYSTEM_IMPL_H_
 
 #include "media/audio/audio_system.h"
 
 namespace base {
@@ skipping 33 matching lines @@
       OnInputDeviceInfoCallback on_input_device_info_cb) override;
 
   base::SingleThreadTaskRunner* GetTaskRunner() const override;
 
  protected:
   AudioSystemImpl(AudioManager* audio_manager);
 
  private:
   AudioManager* const audio_manager_;
 
+  static AudioParameters GetInputParametersOnDeviceThread(
+      AudioManager* audio_manager,
+      const std::string& device_id);
+
+  static AudioParameters GetOutputParametersOnDeviceThread(
+      AudioManager* audio_manager,
+      const std::string& device_id);
+
+  static AudioDeviceDescriptions GetDeviceDescriptionsOnDeviceThread(
+      AudioManager* audio_manager,
+      bool for_input);
+
+  static void GetInputDeviceInfoOnDeviceThread(
+      AudioManager* audio_manager,
+      const std::string& input_device_id,
+      AudioSystem::OnInputDeviceInfoCallback on_input_device_info_cb);
+
   DISALLOW_COPY_AND_ASSIGN(AudioSystemImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_SYSTEM_IMPL_H_