Replace deprecated base::NonThreadSafe in chrome in favor of SequenceChecker.

chrome/browser/browser_process_platform_part_chromeos.h

 // Copyright (c) 2013 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 CHROME_BROWSER_BROWSER_PROCESS_PLATFORM_PART_CHROMEOS_H_
 #define CHROME_BROWSER_BROWSER_PROCESS_PLATFORM_PART_CHROMEOS_H_
 
 #include <memory>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/containers/flat_set.h"
 #include "base/macros.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "chrome/browser/browser_process_platform_part_base.h"
 
 namespace chromeos {
 class ChromeSessionManager;
 class ChromeUserManager;
 class ProfileHelper;
 class TimeZoneResolver;
 }
 
 namespace chromeos {
 namespace system {
 class AutomaticRebootManager;
 class DeviceDisablingManager;
 class DeviceDisablingManagerDefaultDelegate;
 class SystemClock;
 class TimeZoneResolverManager;
 }
 }
 
 namespace policy {
 class BrowserPolicyConnector;
 class BrowserPolicyConnectorChromeOS;
 }
 
 class ScopedKeepAlive;
 
-class BrowserProcessPlatformPart : public BrowserProcessPlatformPartBase,
-                                   public base::NonThreadSafe {
+class BrowserProcessPlatformPart : public BrowserProcessPlatformPartBase {
  public:
   BrowserProcessPlatformPart();
   ~BrowserProcessPlatformPart() override;
 
   void InitializeAutomaticRebootManager();
   void ShutdownAutomaticRebootManager();
 
   void InitializeChromeUserManager();
   void DestroyChromeUserManager();
 
@@ skipping 72 matching lines @@
   std::unique_ptr<chromeos::system::TimeZoneResolverManager>
       timezone_resolver_manager_;
   std::unique_ptr<chromeos::TimeZoneResolver> timezone_resolver_;
 
   std::unique_ptr<chromeos::system::SystemClock> system_clock_;
 
   std::unique_ptr<ScopedKeepAlive> keep_alive_;
 
   base::flat_set<std::string> compatible_cros_components_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(BrowserProcessPlatformPart);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_PLATFORM_PART_CHROMEOS_H_