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

chrome/browser/ui/webui/options/manage_profile_handler.h

Index: chrome/browser/ui/webui/options/manage_profile_handler.h
diff --git a/chrome/browser/ui/webui/options/manage_profile_handler.h b/chrome/browser/ui/webui/options/manage_profile_handler.h
index 0149b5700377f778b4a1652bedf256da75ba9296..7a2f67420529115767b9fbe6e2a78f263554f167 100644
--- a/chrome/browser/ui/webui/options/manage_profile_handler.h
+++ b/chrome/browser/ui/webui/options/manage_profile_handler.h
@@ -74,6 +74,13 @@ class ManageProfileHandler : public OptionsPageUIHandler {
   // |args| is of the form: [ {string} profileFilePath ]
   void DeleteProfile(const base::ListValue* args);
 
+#if defined(ENABLE_SETTINGS_APP)
+  // Callback for the "profilesAppListSwitch" message. Asks the
+  // app_list_controller to change the profile registered for the AppList.
+  // |args| is of the form: [ {string} profileFilePath ]
+  void ProfilesAppListSwitch(const base::ListValue* args);

[Evan Stade, 2013/01/23 22:18:33]

can you make this function and message name more similar to  an English sentence
in terms of word order?

[koz (OOO until 15th September), 2013/01/25 00:32:46]

I've changed it to SwitchAppListProfile().

+#endif
+
   // Callback for the 'profileIconSelectionChanged' message. Used to update the
   // name in the manager profile dialog based on the selected icon.
   void ProfileIconSelectionChanged(const base::ListValue* args);