Move {Resolve|Reject}JavascriptCallback helpers in WebUIMessageHandler.

chrome/browser/ui/webui/settings/settings_page_ui_handler.h

Index: chrome/browser/ui/webui/settings/settings_page_ui_handler.h
diff --git a/chrome/browser/ui/webui/settings/settings_page_ui_handler.h b/chrome/browser/ui/webui/settings/settings_page_ui_handler.h
index b359130dd9df467c350b6b048981060b0af1d9bd..7007a7514242b9c9eac7a697a6e1a7b36b734397 100644
--- a/chrome/browser/ui/webui/settings/settings_page_ui_handler.h
+++ b/chrome/browser/ui/webui/settings/settings_page_ui_handler.h
@@ -17,19 +17,6 @@ class SettingsPageUIHandler : public content::WebUIMessageHandler {
   SettingsPageUIHandler();
   ~SettingsPageUIHandler() override;
 
- protected:
-  // Helper method for responding to JS requests initiated with
-  // cr.sendWithPromise(), for the case where the returned promise should be
-  // resolved (request succeeded).
-  void ResolveJavascriptCallback(const base::Value& callback_id,
-                                 const base::Value& response);
-
-  // Helper method for responding to JS requests initiated with
-  // cr.sendWithPromise(), for the case where the returned promise should be
-  // rejected (request failed).
-  void RejectJavascriptCallback(const base::Value& callback_id,
-                                const base::Value& response);
-
  private:
   // SettingsPageUIHandler subclasses must be JavaScript-lifecycle safe.
   void OnJavascriptAllowed() override = 0;