Move browser-agnostic code from file_system_util to file_system_core_util.

chrome/browser/chromeos/fileapi/external_file_url_request_job.cc

 // 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.
 
 #include "chrome/browser/chromeos/fileapi/external_file_url_request_job.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/browser_process.h"
-#include "chrome/browser/chromeos/drive/file_system_util.h"
+#include "chrome/browser/chromeos/drive/file_system_core_util.h"
 #include "chrome/browser/chromeos/file_manager/fileapi_util.h"
 #include "chrome/browser/chromeos/fileapi/external_file_url_util.h"
 #include "chrome/browser/extensions/api/file_handlers/mime_util.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/common/url_constants.h"
 #include "net/base/net_errors.h"
 #include "net/http/http_byte_range.h"
 #include "net/http/http_request_headers.h"
@@ skipping 346 matching lines @@
     NotifyDone(
         net::URLRequestStatus(net::URLRequestStatus::FAILED, read_result));
   }
 
   remaining_bytes_ -= read_result;
   SetStatus(net::URLRequestStatus());  // Clear the IO_PENDING status.
   NotifyReadComplete(read_result);
 }
 
 }  // namespace chromeos