Revert r95841 due to failing media_unittests on linux_shared bot.

media/base/data_buffer.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.
 
 // A simple implementation of Buffer that takes ownership of the given data
 // pointer.
 //
 // DataBuffer assumes that memory was allocated with new uint8[].
 
 #ifndef MEDIA_BASE_DATA_BUFFER_H_
 #define MEDIA_BASE_DATA_BUFFER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "media/base/buffers.h"
 
 namespace media {
 
-class MEDIA_EXPORT DataBuffer : public Buffer {
+class DataBuffer : public Buffer {
  public:
   // Takes ownership of the passed |buffer|, assumes valid data of size
   // |buffer_size|.
   DataBuffer(uint8* buffer, size_t buffer_size);
 
   // Allocates buffer of size |buffer_size|. If |buffer_size| is 0, |data_| is
   // set to a NULL ptr.
   explicit DataBuffer(size_t buffer_size);
 
   // Buffer implementation.
@@ skipping 17 matching lines @@
   scoped_array<uint8> data_;
   size_t buffer_size_;
   size_t data_size_;
 
   DISALLOW_COPY_AND_ASSIGN(DataBuffer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_DATA_BUFFER_H_