diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index 3bb3c80..86a09cf 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -956,6 +956,11 @@
 constexpr char kDownloadDuplicateFilePromptEnabled[] =
     "download_duplicate_file_prompt_enabled";
 
+// Deprecated 12/2023.
+#if BUILDFLAG(IS_CHROMEOS_ASH)
+constexpr char kIsolatedWebAppsEnabled[] = "ash.isolated_web_apps_enabled";
+#endif  // BUILDFLAG(IS_CHROMEOS_ASH)
+
 // Register local state used only for migration (clearing or moving to a new
 // key).
 void RegisterLocalStatePrefsForMigration(PrefRegistrySimple* registry) {
@@ -1071,6 +1076,11 @@
 #if BUILDFLAG(IS_CHROMEOS_ASH)
   registry->RegisterBooleanPref(kGestureEducationNotificationShown, true);
 #endif
+
+  // Deprecated 11/2023.
+#if BUILDFLAG(IS_CHROMEOS_ASH)
+  registry->RegisterBooleanPref(kIsolatedWebAppsEnabled, false);
+#endif
 }
 
 // Register prefs used only for migration (clearing or moving to a new key).
@@ -2213,6 +2223,11 @@
   local_state->ClearPref(kGestureEducationNotificationShown);
 #endif
 
+// Added 11/2023.
+#if BUILDFLAG(IS_CHROMEOS_ASH)
+  local_state->ClearPref(kIsolatedWebAppsEnabled);
+#endif
+
   // Please don't delete the following line. It is used by PRESUBMIT.py.
   // END_MIGRATE_OBSOLETE_LOCAL_STATE_PREFS