Deprecate NonThreadSafe in components/sync in favor of SequenceChecker.

components/sync/base/sync_prefs.h

 // 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.
 
 #ifndef COMPONENTS_SYNC_BASE_SYNC_PREFS_H_
 #define COMPONENTS_SYNC_BASE_SYNC_PREFS_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "components/prefs/pref_member.h"
 #include "components/sync/base/model_type.h"
 #include "components/sync/protocol/sync.pb.h"
 
 class PrefService;
 
 namespace user_prefs {
 class PrefRegistrySyncable;
@@ skipping 17 matching lines @@
 //
 // TODO(akalin): Some classes still read the prefs directly.  Consider
 // passing down a pointer to SyncPrefs to them.  A list of files:
 //
 //   profile_sync_service_startup_unittest.cc
 //   profile_sync_service.cc
 //   sync_setup_flow.cc
 //   sync_setup_wizard.cc
 //   sync_setup_wizard_unittest.cc
 //   two_client_preferences_sync_test.cc
-class SyncPrefs : NON_EXPORTED_BASE(public base::NonThreadSafe),
-                  public base::SupportsWeakPtr<SyncPrefs> {
+class SyncPrefs : public base::SupportsWeakPtr<SyncPrefs> {
  public:
   // |pref_service| may not be null.
   // Does not take ownership of |pref_service|.
   explicit SyncPrefs(PrefService* pref_service);
 
   // For testing.
   SyncPrefs();
 
   virtual ~SyncPrefs();
 
@@ skipping 145 matching lines @@
   // Groups of prefs that always have the same value as a "master" pref.
   // For example, the APPS group has {APP_NOTIFICATIONS, APP_SETTINGS}
   // (as well as APPS, but that is implied), so
   //   pref_groups_[APPS] =       { APP_NOTIFICATIONS,
   //                                          APP_SETTINGS }
   //   pref_groups_[EXTENSIONS] = { EXTENSION_SETTINGS }
   // etc.
   using PrefGroupsMap = std::map<ModelType, ModelTypeSet>;
   PrefGroupsMap pref_groups_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(SyncPrefs);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_BASE_SYNC_PREFS_H_