Remove stray platform_file.h from chrome and components

chrome/browser/chromeos/extensions/file_manager/private_api_file_system.h

 // Copyright 2013 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 provides file system related API functions.
 
 #ifndef CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_FILE_SYSTEM_H_
 
 #include <string>
 
-#include "base/platform_file.h"
 #include "chrome/browser/chromeos/drive/file_errors.h"
 #include "chrome/browser/chromeos/extensions/file_manager/private_api_base.h"
 
 class GURL;
 
 namespace base {
 class FilePath;
 }
 
 namespace fileapi {
@@ skipping 180 matching lines @@
  protected:
   virtual ~FileBrowserPrivateCancelCopyFunction() {}
 
   // AsyncExtensionFunction overrides.
   virtual bool RunAsync() OVERRIDE;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_FILE_SYSTEM_H_