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

components/invalidation/impl/invalidator_storage_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/invalidation/impl/invalidator_storage.h"
 
+#include "base/prefs/pref_service.h"
 #include "base/strings/string_util.h"
 #include "components/invalidation/impl/unacked_invalidation_set_test_util.h"
 #include "components/pref_registry/testing_pref_service_syncable.h"
-#include "components/prefs/pref_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace invalidation {
 
 class InvalidatorStorageTest : public testing::Test {
  public:
   InvalidatorStorageTest() {}
 
   void SetUp() override {
     InvalidatorStorage::RegisterProfilePrefs(pref_service_.registry());
@@ skipping 73 matching lines @@
   map.insert(std::make_pair(storage2.object_id(), storage2));
 
   storage.SetSavedInvalidations(map);
   syncer::UnackedInvalidationsMap restored_map =
       storage.GetSavedInvalidations();
 
   EXPECT_THAT(map, syncer::test_util::Eq(restored_map));
 }
 
 }  // namespace invalidation