Fix IWYU violators that don't include scoped_ptr.h in Windows build.

content/browser/fileapi/upload_file_system_file_element_reader.h

 // Copyright 2014 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 CONTENT_BROWSER_FILEAPI_UPLOAD_FILE_SYSTEM_FILE_ELEMENT_READER_H_
 #define CONTENT_BROWSER_FILEAPI_UPLOAD_FILE_SYSTEM_FILE_ELEMENT_READER_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "content/common/content_export.h"
 #include "net/base/upload_element_reader.h"
 #include "url/gurl.h"
 
 namespace storage {
 class FileStreamReader;
 }
 
@@ skipping 39 matching lines @@
   uint64_t position_;
 
   base::WeakPtrFactory<UploadFileSystemFileElementReader> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UploadFileSystemFileElementReader);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FILEAPI_UPLOAD_FILE_SYSTEM_FILE_ELEMENT_READER_H_