FBTF: Remove "obviously" unneeded standard C++ library #includes.

chrome/browser/download/download_file_manager.h

 // Copyright (c) 2010 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.
 //
 // The DownloadFileManager owns a set of DownloadFile objects, each of which
 // represent one in progress download and performs the disk IO for that
 // download. The DownloadFileManager itself is a singleton object owned by the
 // ResourceDispatcherHost.
 //
 // The DownloadFileManager uses the file_thread for performing file write
@@ skipping 23 matching lines @@
 // tab (profile) where the download was initiated. In the event of a tab closure
 // during a download, the DownloadFileManager will continue to route data to the
 // appropriate DownloadManager. In progress downloads are cancelled for a
 // DownloadManager that exits (such as when closing a profile).
 
 #ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_MANAGER_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_MANAGER_H_
 #pragma once
 
 #include <map>
-#include <string>
 
 #include "base/basictypes.h"
 #include "base/hash_tables.h"
 #include "base/lock.h"
 #include "base/ref_counted.h"
 #include "base/timer.h"
 #include "gfx/native_widget_types.h"
 
 struct DownloadBuffer;
 struct DownloadCreateInfo;
@@ skipping 117 matching lines @@
   // Used for progress updates on the UI thread, mapping download->id() to bytes
   // received so far. Written to by the file thread and read by the UI thread.
   typedef base::hash_map<int, int64> ProgressMap;
   ProgressMap ui_progress_;
   Lock progress_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadFileManager);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_MANAGER_H_