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

components/drive/file_system_unittest.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 <stdint.h>
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/prefs/testing_pref_service.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "components/drive/change_list_loader.h"
 #include "components/drive/drive.pb.h"
 #include "components/drive/drive_api_util.h"
 #include "components/drive/drive_test_util.h"
 #include "components/drive/event_logger.h"
 #include "components/drive/fake_free_disk_space_getter.h"
 #include "components/drive/file_change.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/service/fake_drive_service.h"
 #include "components/drive/service/test_util.h"
 #include "components/drive/sync_client.h"
-#include "components/prefs/testing_pref_service.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "google_apis/drive/drive_api_parser.h"
 #include "google_apis/drive/test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace drive {
 namespace {
 
 // Counts the number of invocation, and if it increased up to |expected_counter|
@@ skipping 1015 matching lines @@
       google_apis::test_util::CreateCopyResultCallback(&available));
   content::RunAllBlockingPoolTasksUntilIdle();
   ASSERT_FALSE(available);
 
   entry = GetResourceEntrySync(file_in_root);
   ASSERT_TRUE(entry);
   EXPECT_FALSE(entry->file_specific_info().cache_state().is_present());
 }
 
 }   // namespace drive