Final cleanup pass over audio device API

extensions/browser/api/audio/audio_api.h

 // Copyright (c) 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.
 
 #ifndef EXTENSIONS_BROWSER_API_AUDIO_AUDIO_API_H_
 #define EXTENSIONS_BROWSER_API_AUDIO_AUDIO_API_H_
 
 #include "extensions/browser/api/audio/audio_service.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
 #include "extensions/browser/extension_function.h"
@@ skipping 32 matching lines @@
 
 class AudioGetInfoFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("audio.getInfo", AUDIO_GETINFO);
 
  protected:
   ~AudioGetInfoFunction() override {}
   ResponseAction Run() override;
 };
 
+class AudioGetDevicesFunction : public UIThreadExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("audio.getDevices", AUDIO_GETDEVICES);
+
+ protected:
+  ~AudioGetDevicesFunction() override {}
+  ResponseAction Run() override;
+};
+
 class AudioSetActiveDevicesFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("audio.setActiveDevices", AUDIO_SETACTIVEDEVICES);
 
  protected:
   ~AudioSetActiveDevicesFunction() override {}
   ResponseAction Run() override;
 };
 
 class AudioSetPropertiesFunction : public UIThreadExtensionFunction {
@@ skipping 19 matching lines @@
   DECLARE_EXTENSION_FUNCTION("audio.getMute", AUDIO_GETMUTE);
 
  protected:
   ~AudioGetMuteFunction() override {}
   ResponseAction Run() override;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_AUDIO_AUDIO_API_H_