Replace deprecated base::NonThreadSafe in chrome/browser/ssl in favor of SequenceChecker.

chrome/browser/ssl/ssl_error_handler.cc

 // Copyright 2014 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 "chrome/browser/ssl/ssl_error_handler.h"
 
 #include <stdint.h>
 #include <unordered_set>
 #include <utility>
 
 #include "base/callback_helpers.h"
 #include "base/feature_list.h"
 #include "base/files/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/stringprintf.h"
-#include "base/threading/non_thread_safe.h"
 #include "base/time/clock.h"
 #include "base/time/time.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ssl/bad_clock_blocking_page.h"
 #include "chrome/browser/ssl/ssl_blocking_page.h"
 #include "chrome/browser/ssl/ssl_cert_reporter.h"
 #include "chrome/browser/ssl/ssl_error_assistant.pb.h"
 #include "chrome/common/features.h"
 #include "chrome/grit/browser_resources.h"
@@ skipping 131 matching lines @@
   }
   return hashes;
 }
 #endif
 
 bool IsSSLCommonNameMismatchHandlingEnabled() {
   return base::FeatureList::IsEnabled(kSSLCommonNameMismatchHandling);
 }
 
 // Configuration for SSLErrorHandler.
-class ConfigSingleton : public base::NonThreadSafe {
+class ConfigSingleton {
  public:
   ConfigSingleton();
 
   base::TimeDelta interstitial_delay() const;
   SSLErrorHandler::TimerStartedCallback* timer_started_callback() const;
   base::Clock* clock() const;
   network_time::NetworkTimeTracker* network_time_tracker() const;
 
 #if BUILDFLAG(ENABLE_CAPTIVE_PORTAL_DETECTION)
   // Returns true if any of the SHA256 hashes in |ssl_info| is of a captive
@@ skipping 590 matching lines @@
   network_time::NetworkTimeTracker* tracker =
       g_config.Pointer()->network_time_tracker();
   ssl_errors::ClockState clock_state = ssl_errors::GetClockState(now, tracker);
   if (clock_state == ssl_errors::CLOCK_STATE_FUTURE ||
       clock_state == ssl_errors::CLOCK_STATE_PAST) {
     ShowBadClockInterstitial(now, clock_state);
     return;  // |this| is deleted after showing the interstitial.
   }
   ShowSSLInterstitial();
 }