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

chrome/browser/extensions/warning_badge_service.cc

Index: chrome/browser/extensions/warning_badge_service.cc
diff --git a/chrome/browser/extensions/warning_badge_service.cc b/chrome/browser/extensions/warning_badge_service.cc
index 130443e32456ad3a93606d6bb8ff61b784474a3c..3b3024516e639250041d9bf344feb99fe81a639e 100644
--- a/chrome/browser/extensions/warning_badge_service.cc
+++ b/chrome/browser/extensions/warning_badge_service.cc
@@ -101,11 +101,12 @@ int ErrorBadge::GetMenuItemCommandID() {
 
 WarningBadgeService::WarningBadgeService(Profile* profile)
     : profile_(profile), warning_service_observer_(this) {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   warning_service_observer_.Add(WarningService::Get(profile_));
 }
 
 WarningBadgeService::~WarningBadgeService() {
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 }
 
 // static
@@ -115,7 +116,7 @@ WarningBadgeService* WarningBadgeService::Get(
 }
 
 void WarningBadgeService::SuppressCurrentWarnings() {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   size_t old_size = suppressed_warnings_.size();
 
   const WarningSet& warnings = GetCurrentWarnings();
@@ -131,7 +132,7 @@ const WarningSet& WarningBadgeService::GetCurrentWarnings() const {
 
 void WarningBadgeService::ExtensionWarningsChanged(
     const ExtensionIdSet& affected_extensions) {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   UpdateBadgeStatus();
 }