[Hotword] Sync Audio History pref every 24 hours, when opening chrome://settings and . . .

chrome/browser/ui/webui/options/browser_options_handler.h

Index: chrome/browser/ui/webui/options/browser_options_handler.h
diff --git a/chrome/browser/ui/webui/options/browser_options_handler.h b/chrome/browser/ui/webui/options/browser_options_handler.h
index 6bfd46a5ac979aa5aae1eea930a01bc2b9dbbe66..2c76404dfae38ffd295003715fdec24836c62ce4 100644
--- a/chrome/browser/ui/webui/options/browser_options_handler.h
+++ b/chrome/browser/ui/webui/options/browser_options_handler.h
@@ -285,6 +285,12 @@ class BrowserOptionsHandler
   // the hotword section of the settings page.
   void SendHotwordAvailable();
 
+  // Callback that updates the visibility of the audio history upon completion
+  // of a call to the server to the get the current value.
+  void SetHotwordAudioHistorySectionVisible(bool always_on,
+                                            bool success,
+                                            bool logging_enabled);
+
   // Callback for "requestHotwordAvailable" message.
   void HandleRequestHotwordAvailable(const base::ListValue* args);