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

chrome/browser/themes/theme_service.cc

Index: chrome/browser/themes/theme_service.cc
diff --git a/chrome/browser/themes/theme_service.cc b/chrome/browser/themes/theme_service.cc
index 3a0161e9881e235d2e307ff2307da9b772a3538d..6a9d0e1e40a102972fba8dd3e20467802ff9fe0a 100644
--- a/chrome/browser/themes/theme_service.cc
+++ b/chrome/browser/themes/theme_service.cc
@@ -225,11 +225,12 @@ ThemeService::ThemeService()
       weak_ptr_factory_(this) {}
 
 ThemeService::~ThemeService() {
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   FreePlatformCaches();
 }
 
 void ThemeService::Init(Profile* profile) {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   profile_ = profile;
 
   LoadThemePrefs();
@@ -520,7 +521,7 @@ SkColor ThemeService::GetDefaultColor(int id, bool incognito) const {
 }
 
 color_utils::HSL ThemeService::GetTint(int id, bool incognito) const {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
   color_utils::HSL hsl;
   if (theme_supplier_ && theme_supplier_->GetTint(id, &hsl))
@@ -694,7 +695,7 @@ gfx::ImageSkia* ThemeService::GetImageSkiaNamed(int id, bool incognito) const {
 }
 
 SkColor ThemeService::GetColor(int id, bool incognito) const {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
   // For legacy reasons, |theme_supplier_| requires the incognito variants
   // of color IDs.
@@ -758,7 +759,7 @@ base::RefCountedMemory* ThemeService::GetRawData(
 }
 
 gfx::Image ThemeService::GetImageNamed(int id, bool incognito) const {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
   int adjusted_id = id;
   if (incognito) {