Deprecate NonThreadSafe in rlz in favor of SequenceChecker.

rlz/chromeos/lib/rlz_value_store_chromeos.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 RLZ_CHROMEOS_LIB_RLZ_VALUE_STORE_CHROMEOS_H_
 #define RLZ_CHROMEOS_LIB_RLZ_VALUE_STORE_CHROMEOS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "rlz/lib/rlz_value_store.h"
 
 namespace base {
 class DictionaryValue;
 class Value;
 }
 
 namespace rlz_lib {
 
 // An implementation of RlzValueStore for ChromeOS.
-class RlzValueStoreChromeOS : public RlzValueStore,
-                              public base::NonThreadSafe {
+class RlzValueStoreChromeOS : public RlzValueStore {
  public:
   // Creates new instance and synchronously reads data from file.
   explicit RlzValueStoreChromeOS(const base::FilePath& store_path);
   ~RlzValueStoreChromeOS() override;
 
   // RlzValueStore overrides:
   bool HasAccess(AccessType type) override;
 
   bool WritePingTime(Product product, int64_t time) override;
   bool ReadPingTime(Product product, int64_t* time) override;
@@ skipping 32 matching lines @@
   bool RemoveValueFromList(const std::string& list_name,
                            const base::Value& value);
 
   // In-memory store with RLZ data.
   std::unique_ptr<base::DictionaryValue> rlz_store_;
 
   base::FilePath store_path_;
 
   bool read_only_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(RlzValueStoreChromeOS);
 };
 
 }  // namespace rlz_lib
 
 #endif  // RLZ_CHROMEOS_LIB_RLZ_VALUE_STORE_CHROMEOS_H_