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

chrome/browser/resources/options/options_page.js

Index: chrome/browser/resources/options/options_page.js
diff --git a/chrome/browser/resources/options/options_page.js b/chrome/browser/resources/options/options_page.js
index 958e06efa66cfaf55d1a7f6eca62497b671fad6a..af164831499506f04cec71282573d52175c988b4 100644
--- a/chrome/browser/resources/options/options_page.js
+++ b/chrome/browser/resources/options/options_page.js
@@ -42,6 +42,12 @@ cr.define('options', function() {
   OptionsPage.horizontalOffset = 155;
 
   /**
+   * True if SettingsApp features are enabled for the options page.
+   * @private
+   */
+  OptionsPage.settingsApp_ = false;
+
+  /**
    * Main level option pages. Maps lower-case page names to the respective page
    * object.
    * @protected
@@ -718,6 +724,14 @@ cr.define('options', function() {
     }
   };
 
+  OptionsPage.setIsSettingsApp = function() {
+    OptionsPage.settingsApp_ = true;
+  };
+
+  OptionsPage.isSettingsApp = function() {
+    return OptionsPage.settingsApp_;
+  };
+
   OptionsPage.prototype = {
     __proto__: cr.EventTarget.prototype,