[Extensions] Convert some SyncExtensionFunctions

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 23 matching lines @@
 
   // BrowserContextKeyedAPI implementation.
   static const char* service_name() {
     return "AudioAPI";
   }
 
   content::BrowserContext* const browser_context_;
   AudioService* service_;
 };
 
-class AudioGetInfoFunction : public SyncExtensionFunction {
+class AudioGetInfoFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("audio.getInfo", AUDIO_GETINFO);
 
  protected:
   ~AudioGetInfoFunction() override {}
-  bool RunSync() override;
+  ResponseAction Run() override;
 };
 
-class AudioSetActiveDevicesFunction : public SyncExtensionFunction {
+class AudioSetActiveDevicesFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("audio.setActiveDevices", AUDIO_SETACTIVEDEVICES);
 
  protected:
   ~AudioSetActiveDevicesFunction() override {}
-  bool RunSync() override;
+  ResponseAction Run() override;
 };
 
-class AudioSetPropertiesFunction : public SyncExtensionFunction {
+class AudioSetPropertiesFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("audio.setProperties", AUDIO_SETPROPERTIES);
 
  protected:
   ~AudioSetPropertiesFunction() override {}
-  bool RunSync() override;
+  ResponseAction Run() override;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_AUDIO_AUDIO_API_H_