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

chrome/browser/ui/app_list/app_list_util.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #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 UpdateProfilePath(const FilePath& profile_file_path);

[benwells, 2013/01/18 06:18:46]

Nit UpdateAppListProfile might be a better name: more specific to the app list,
and is is not just updating the preference but the profile in use.

[koz (OOO until 15th September), 2013/01/20 23:32:00]

I've changed it to SetAppListProfile() (and made the follow-on renames).

+
+// Get the path of the profile to be used with the app list.
+FilePath GetAppListProfilePath(const FilePath& user_data_dir);
+#endif
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_APP_LIST_UTIL_H_