Revert r95841 due to failing media_unittests on linux_shared bot.

media/audio/audio_output_controller.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_AUDIO_AUDIO_OUTPUT_CONTROLLER_H_
 #define MEDIA_AUDIO_AUDIO_OUTPUT_CONTROLLER_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
@@ skipping 31 matching lines @@
 // Regular latency mode:
 //   In this mode we receive signals from AudioOutputController and then we
 //   enqueue data into it.
 //
 // Low latency mode:
 //   In this mode a DataSource object is given to the AudioOutputController
 //   and AudioOutputController reads from it synchronously.
 //
 namespace media {
 
-class MEDIA_EXPORT AudioOutputController
+class AudioOutputController
     : public base::RefCountedThreadSafe<AudioOutputController>,
       public AudioOutputStream::AudioSourceCallback {
  public:
   // Internal state of the source.
   enum State {
     kEmpty,
     kCreated,
     kPlaying,
     kPaused,
     kClosed,
@@ skipping 139 matching lines @@
 
   // The message loop of audio thread that this object runs on.
   MessageLoop* message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioOutputController);
 };
 
 }  // namespace media
 
 #endif  //  MEDIA_AUDIO_AUDIO_OUTPUT_CONTROLLER_H_