Make extensions DSE persistent in browser prefs

chrome/browser/extensions/api/settings_overrides/settings_overrides_api.h

Index: chrome/browser/extensions/api/settings_overrides/settings_overrides_api.h
diff --git a/chrome/browser/extensions/api/settings_overrides/settings_overrides_api.h b/chrome/browser/extensions/api/settings_overrides/settings_overrides_api.h
index 5167a049a47666461a082edef9562bd4cbf4228d..92bdbea882ca317f12a9493a3d0a0cfe2d218942 100644
--- a/chrome/browser/extensions/api/settings_overrides/settings_overrides_api.h
+++ b/chrome/browser/extensions/api/settings_overrides/settings_overrides_api.h
@@ -5,6 +5,7 @@
 #ifndef CHROME_BROWSER_EXTENSIONS_API_SETTINGS_OVERRIDES_SETTINGS_OVERRIDES_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_SETTINGS_OVERRIDES_SETTINGS_OVERRIDES_API_H_
 
+#include <memory>
 #include <set>
 #include <string>
 
@@ -38,9 +39,9 @@ class SettingsOverridesAPI : public BrowserContextKeyedAPI,
   // Wrappers around PreferenceAPI.
   void SetPref(const std::string& extension_id,
                const std::string& pref_key,
-               base::Value* value);
+               std::unique_ptr<base::Value> value) const;
   void UnsetPref(const std::string& extension_id,
-                 const std::string& pref_key);
+                 const std::string& pref_key) const;
 
   // ExtensionRegistryObserver implementation.
   void OnExtensionLoaded(content::BrowserContext* browser_context,