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

net/base/file_stream.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.
 
 // This file defines FileStream, a basic interface for reading and writing files
 // synchronously or asynchronously with support for seeking to an offset.
 // Note that even when used asynchronously, only one operation is supported at
 // a time.
 
 #ifndef NET_BASE_FILE_STREAM_H_
 #define NET_BASE_FILE_STREAM_H_
 
 #include <stdint.h>
 
 #include "base/files/file.h"
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_export.h"
 
 namespace base {
 class FilePath;
 class TaskRunner;
 }
 
 namespace net {
 
@@ skipping 124 matching lines @@
   // without explicitly calling Close, the file should be closed asynchronously
   // without delaying FileStream's destructor.
   scoped_ptr<Context> context_;
 
   DISALLOW_COPY_AND_ASSIGN(FileStream);
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_FILE_STREAM_H_