Revert r95841 due to failing media_unittests on linux_shared bot.

media/base/message_loop_factory.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_MESSAGE_LOOP_FACTORY_H_
 #define MEDIA_BASE_MESSAGE_LOOP_FACTORY_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop_proxy.h"
-#include "media/base/media_export.h"
 
 class MessageLoop;
 
 namespace media {
 
 // Factory object that manages named MessageLoops.
-class MEDIA_EXPORT MessageLoopFactory {
+class MessageLoopFactory {
  public:
   // Get the message loop associated with |name|. A new MessageLoop
   // is created if the factory doesn't have one associated with |name|.
   // NULL is returned if |name| is an empty string, or a new
   // MessageLoop needs to be created and a failure occurs during the
   // creation process.
   virtual MessageLoop* GetMessageLoop(const std::string& name) = 0;
 
   // Get the message loop proxy associated with |name|. A new MessageLoopProxy
   // is created if the factory doesn't have one associated with |name|.
   // NULL is returned if |name| is an empty string, or a new
   // MessageLoop needs to be created and a failure occurs during the
   // creation process.
   virtual scoped_refptr<base::MessageLoopProxy> GetMessageLoopProxy(
       const std::string& name) = 0;
 
  protected:
   // Only allow scoped_ptr<> to delete factory.
   friend class scoped_ptr<MessageLoopFactory>;
   virtual ~MessageLoopFactory();
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MESSAGE_LOOP_FACTORY_H_