Revert of Delete base/prefs and update callers to use components.

components/drive/file_system.cc

 // Copyright (c) 2012 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 "components/drive/file_system.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
+#include "base/prefs/pref_service.h"
 #include "components/drive/change_list_loader.h"
 #include "components/drive/directory_loader.h"
 #include "components/drive/drive.pb.h"
 #include "components/drive/drive_pref_names.h"
 #include "components/drive/file_cache.h"
 #include "components/drive/file_change.h"
 #include "components/drive/file_system/copy_operation.h"
 #include "components/drive/file_system/create_directory_operation.h"
 #include "components/drive/file_system/create_file_operation.h"
 #include "components/drive/file_system/download_operation.h"
 #include "components/drive/file_system/get_file_for_saving_operation.h"
 #include "components/drive/file_system/move_operation.h"
 #include "components/drive/file_system/open_file_operation.h"
 #include "components/drive/file_system/remove_operation.h"
 #include "components/drive/file_system/search_operation.h"
 #include "components/drive/file_system/set_property_operation.h"
 #include "components/drive/file_system/touch_operation.h"
 #include "components/drive/file_system/truncate_operation.h"
 #include "components/drive/file_system_core_util.h"
 #include "components/drive/file_system_observer.h"
 #include "components/drive/job_scheduler.h"
 #include "components/drive/remove_stale_cache_files.h"
 #include "components/drive/resource_entry_conversion.h"
 #include "components/drive/search_metadata.h"
 #include "components/drive/sync_client.h"
-#include "components/prefs/pref_service.h"
 #include "google_apis/drive/drive_api_parser.h"
 
 namespace drive {
 namespace {
 
 // Gets a ResourceEntry from the metadata, and overwrites its file info when the
 // cached file is dirty.
 FileError GetLocallyStoredResourceEntry(
     internal::ResourceMetadata* resource_metadata,
     internal::FileCache* cache,
@@ skipping 1005 matching lines @@
 
 void FileSystem::CalculateEvictableCacheSize(
     const EvictableCacheSizeCallback& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(!callback.is_null());
   base::PostTaskAndReplyWithResult(
       blocking_task_runner_.get(), FROM_HERE,
       base::Bind(&CalculateEvictableCacheSizeOnBlockingPool, cache_), callback);
 }
 }  // namespace drive