Revert r95841 due to failing media_unittests on linux_shared bot.

media/filters/audio_file_reader.h

 // Copyright (c) 2011 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_FILTERS_AUDIO_FILE_READER_H_
 #define MEDIA_FILTERS_AUDIO_FILE_READER_H_
 
 #include <vector>
 #include "media/filters/ffmpeg_glue.h"
 
 struct AVCodec;
 struct AVCodecContext;
 struct AVFormatContext;
 
 namespace base { class TimeDelta; }
 
 namespace media {
 
 class FFmpegURLProtocol;
 
-class MEDIA_EXPORT AudioFileReader {
+class AudioFileReader {
  public:
   // Audio file data will be read using the given protocol.
   // The AudioFileReader does not take ownership of |protocol| and
   // simply maintains a weak reference to it.
   explicit AudioFileReader(FFmpegURLProtocol* protocol);
   virtual ~AudioFileReader();
 
   // Open() reads the audio data format so that the sample_rate(),
   // channels(), duration(), and number_of_frames() methods can be called.
   // It returns |true| on success.
@@ skipping 18 matching lines @@
   AVFormatContext* format_context_;
   AVCodecContext* codec_context_;
   AVCodec* codec_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioFileReader);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_AUDIO_FILE_READER_H_