Move browser-agnostic code from file_system_util to file_system_core_util.

chrome/browser/chromeos/drive/file_system/download_operation.cc

 // 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.
 
 #include "chrome/browser/chromeos/drive/file_system/download_operation.h"
 
 #include "base/callback_helpers.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/task_runner_util.h"
 #include "chrome/browser/chromeos/drive/drive.pb.h"
 #include "chrome/browser/chromeos/drive/file_cache.h"
 #include "chrome/browser/chromeos/drive/file_change.h"
 #include "chrome/browser/chromeos/drive/file_errors.h"
 #include "chrome/browser/chromeos/drive/file_system/operation_delegate.h"
-#include "chrome/browser/chromeos/drive/file_system_util.h"
+#include "chrome/browser/chromeos/drive/file_system_core_util.h"
 #include "chrome/browser/chromeos/drive/job_scheduler.h"
 #include "chrome/browser/chromeos/drive/resource_metadata.h"
 #include "google_apis/drive/drive_api_error_codes.h"
 
 namespace drive {
 namespace file_system {
 namespace {
 
 // Generates an unused file path with |extension| to |out_path|, as a descendant
 // of |dir|, with its parent directory created.
@@ skipping 503 matching lines @@
   delegate_->OnFileChangedByOperation(changed_files);
   params->OnDownloadCompleted(*cache_file_path, entry_after_update.Pass());
 }
 
 void DownloadOperation::CancelJob(JobID job_id) {
   scheduler_->CancelJob(job_id);
 }
 
 }  // namespace file_system
 }  // namespace drive