Revert r95841 due to failing media_unittests on linux_shared bot.

media/audio/audio_io.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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_IO_H_
 #define MEDIA_AUDIO_AUDIO_IO_H_
 
 #include "base/basictypes.h"
 #include "media/audio/audio_buffers_state.h"
 
 // Low-level audio output support. To make sound there are 3 objects involved:
@@ skipping 26 matching lines @@
 
 
 // Models an audio stream that gets rendered to the audio hardware output.
 // Because we support more audio streams than physically available channels
 // a given AudioOutputStream might or might not talk directly to hardware.
 // An audio stream allocates several buffers for audio data and calls
 // AudioSourceCallback::OnModeData() periodically to fill these buffers,
 // as the data is written to the audio device. Size of each packet is determined
 // by |samples_per_packet| specified in AudioParameters  when the stream is
 // created.
-class MEDIA_EXPORT AudioOutputStream {
+class AudioOutputStream {
  public:
   // Audio sources must implement AudioSourceCallback. This interface will be
   // called in a random thread which very likely is a high priority thread. Do
   // not rely on using this thread TLS or make calls that alter the thread
   // itself such as creating Windows or initializing COM.
-  class MEDIA_EXPORT AudioSourceCallback {
+  class AudioSourceCallback {
    public:
     virtual ~AudioSourceCallback() {}
 
     // Provide more data by filling |dest| up to |max_size| bytes. The provided
     // buffer size is determined by the |samples_per_packet| specified in
     // AudioParameters when the stream is created. The source will return
     // the number of bytes it filled. The expected structure of |dest| is
     // platform and format specific.
     // |buffers_state| contains current state of the buffers, and can be used
     // by the source to calculate delay.
@@ skipping 32 matching lines @@
   virtual void GetVolume(double* volume) = 0;
 
   // Close the stream. This also generates AudioSourceCallback::OnClose().
   // After calling this method, the object should not be used anymore.
   virtual void Close() = 0;
 };
 
 // Models an audio sink receiving recorded audio from the audio driver.
 class AudioInputStream {
  public:
-  class MEDIA_EXPORT AudioInputCallback {
+  class AudioInputCallback {
    public:
     virtual ~AudioInputCallback() {}
 
     // Called by the audio recorder when a full packet of audio data is
     // available. This is called from a special audio thread and the
     // implementation should return as soon as possible.
     virtual void OnData(AudioInputStream* stream, const uint8* src,
                         uint32 size) = 0;
 
     // The stream is done with this callback, the last call received by this
@@ skipping 23 matching lines @@
 
   // Close the stream. This also generates AudioInputCallback::OnClose(). This
   // should be the last call made on this object.
   virtual void Close() = 0;
 
  protected:
   virtual ~AudioInputStream() {}
 };
 
 #endif  // MEDIA_AUDIO_AUDIO_IO_H_