Revert r95841 due to failing media_unittests on linux_shared bot.

media/base/media_log.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_BASE_MEDIA_LOG_H_
 #define MEDIA_BASE_MEDIA_LOG_H_
 #pragma once
 
 #include "base/memory/ref_counted.h"
-#include "media/base/media_export.h"
 #include "media/base/media_log_event.h"
 
 namespace media {
 
-class MEDIA_EXPORT MediaLog : public base::RefCountedThreadSafe<MediaLog> {
+class MediaLog : public base::RefCountedThreadSafe<MediaLog> {
  public:
 
   // Return a string to represent an EventType.
   static const char* EventTypeToString(MediaLogEvent::Type type);
 
   MediaLog();
 
   // Methods called by loggers when events occur. These generate appropriate
   // event parameters so the caller need not worry about them.
   void Load(const std::string& url);
@@ skipping 16 matching lines @@
  private:
   // A unique (to this process) id for this MediaLog.
   int32 id_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaLog);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MEDIA_LOG_H_