Audio output debug recording.

content/browser/renderer_host/media/audio_debug_file_writer.h

 // Copyright 2015 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 CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_DEBUG_FILE_WRITER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_DEBUG_FILE_WRITER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 20 matching lines @@
     : public NON_EXPORTED_BASE(media::AudioFileWriter) {
  public:
   explicit AudioDebugFileWriter(const media::AudioParameters& params);
   ~AudioDebugFileWriter() override;
 
   void Start(const base::FilePath& file) override;
   void Stop() override;
   void Write(std::unique_ptr<media::AudioBus> data) override;
   bool WillWrite() override;
 
+  // Simple create function that can be passed as a callback.
+  static std::unique_ptr<media::AudioFileWriter> CreateAudioDebugFileWriter(
+      const media::AudioParameters& params);
+
  private:
   class AudioFileWriter;
   using AudioFileWriterUniquePtr =
       std::unique_ptr<AudioFileWriter, BrowserThread::DeleteOnFileThread>;
   AudioFileWriterUniquePtr file_writer_;
   const media::AudioParameters params_;
   base::SequenceChecker client_sequence_checker_;
 };
 
 }  // namspace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_DEBUG_FILE_WRITER_H_