Enable profile switching for standalone App Launcher via the Settings App.

chrome/browser/resources/options/browser_options.html

Index: chrome/browser/resources/options/browser_options.html
diff --git a/chrome/browser/resources/options/browser_options.html b/chrome/browser/resources/options/browser_options.html
index 7c26ef9aecc6e30621bf5c69db097ecb71d82b7c..23b8e12cd082e98e52a5fe6f61b542858c026eb1 100644
--- a/chrome/browser/resources/options/browser_options.html
+++ b/chrome/browser/resources/options/browser_options.html
@@ -174,6 +174,11 @@
       </div>
       <div id="profiles-buttons">
         <button id="profiles-create" i18n-content="profilesCreate"></button>
+<if expr="pp_ifdef('enable_settings_app')">
+        <button id="profiles-app-list-switch"
+            i18n-content="profilesAppListSwitch" hidden>
+        </button>
+</if>
         <button id="profiles-manage" i18n-content="profilesManage" disabled>
         </button>
         <button id="profiles-delete" i18n-content="profilesDelete"></button>