diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index cd1f67f..fc9188e 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -943,6 +943,13 @@
 const char kSupportedLinksAppPrefsKey[] = "supported_links_infobar.apps";
 #endif  // BUILDFLAG(IS_CHROMEOS)
 
+// Deprecated 10/2023.
+#if BUILDFLAG(IS_CHROMEOS_ASH)
+constexpr char kNightLightCachedLatitude[] = "ash.night_light.cached_latitude";
+constexpr char kNightLightCachedLongitude[] =
+    "ash.night_light.cached_longitude";
+#endif
+
 // Register local state used only for migration (clearing or moving to a new
 // key).
 void RegisterLocalStatePrefsForMigration(PrefRegistrySimple* registry) {
@@ -1327,6 +1334,12 @@
 #if BUILDFLAG(IS_CHROMEOS)
   registry->RegisterDictionaryPref(kSupportedLinksAppPrefsKey);
 #endif  // BUILDFLAG(IS_CHROMEOS)
+
+// Deprecated 10/2023.
+#if BUILDFLAG(IS_CHROMEOS_ASH)
+  registry->RegisterDoublePref(kNightLightCachedLatitude, 0.0);
+  registry->RegisterDoublePref(kNightLightCachedLongitude, 0.0);
+#endif  // BUILDFLAG(IS_CHROMEOS_ASH)
 }
 
 void ClearSyncRequestedPrefAndMaybeMigrate(PrefService* profile_prefs) {
@@ -2494,6 +2507,12 @@
   profile_prefs->ClearPref(kSupportedLinksAppPrefsKey);
 #endif  // BUILDFLAG(IS_CHROMEOS_ASH)
 
+#if BUILDFLAG(IS_CHROMEOS_ASH)
+  // Added 10/2023.
+  profile_prefs->ClearPref(kNightLightCachedLatitude);
+  profile_prefs->ClearPref(kNightLightCachedLongitude);
+#endif  // BUILDFLAG(IS_CHROMEOS_ASH)
+
   // Please don't delete the following line. It is used by PRESUBMIT.py.
   // END_MIGRATE_OBSOLETE_PROFILE_PREFS