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

chrome/browser/ui/app_list/app_list_util.h

Index: chrome/browser/ui/app_list/app_list_util.h
diff --git a/chrome/browser/ui/app_list/app_list_util.h b/chrome/browser/ui/app_list/app_list_util.h
index 82e3bac1894d534bbcb967183745784153dfd423..ee38004d27ef60ef74a4fa5de80c30a198e2ebef 100644
--- a/chrome/browser/ui/app_list/app_list_util.h
+++ b/chrome/browser/ui/app_list/app_list_util.h
@@ -5,13 +5,24 @@
 #ifndef CHROME_BROWSER_UI_APP_LIST_APP_LIST_UTIL_H_
 #define CHROME_BROWSER_UI_APP_LIST_APP_LIST_UTIL_H_
 
+class FilePath;
+class Profile;
+
 namespace chrome {
 
 // Do any once off initialization needed for the app list.
-void InitAppList();
+void InitAppList(Profile* profile);
 
 // Show the app list.
-void ShowAppList();
+void ShowAppList(Profile* profile);
+
+#if defined(ENABLE_SETTINGS_APP)
+// Change the profile that the app list is showing.
+void SetAppListProfile(const FilePath& profile_file_path);
+
+// Get the path of the profile to be used with the app list.
+FilePath GetAppListProfilePath(const FilePath& user_data_dir);
+#endif
 
 }  // namespace chrome