Fix a bunch of IWYU violators that don't include scoped_ptr.h

media/base/audio_pull_fifo.h

 // Copyright (c) 2012 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_AUDIO_PULL_FIFO_H_
 #define MEDIA_BASE_AUDIO_PULL_FIFO_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "media/base/media_export.h"
 
 namespace media {
 class AudioBus;
 
 // A FIFO (First In First Out) buffer to handle mismatches in buffer sizes
 // between a producer and consumer. The consumer will pull data from this FIFO.
 // If data is already available in the FIFO, it is provided to the consumer.
 // If insufficient data is available to satisfy the request, the FIFO will ask
 // the producer for more data to fulfill a request.
@@ skipping 35 matching lines @@
   // Temporary audio bus to hold the data from the producer.
   scoped_ptr<AudioBus> fifo_;
   int fifo_index_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioPullFifo);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_PULL_FIFO_H_