Clarify settings UI in multi-profiles mode

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

 // Copyright (c) 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_WEBUI_OPTIONS_CORE_OPTIONS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS_CORE_OPTIONS_HANDLER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 70 matching lines @@
 
   // Calls JS callbacks to report a change in the value of the |name|
   // preference. |value| is the new value for |name|.  Called from
   // Notify*Changed methods to fire off the notifications.
   void DispatchPrefChangeNotification(const std::string& name,
                                       scoped_ptr<base::Value> value);
 
   // Creates dictionary value for the pref described by |pref_name|.
   // If |controlling_pref| is not empty, it describes the pref that manages
   // |pref| via policy or extension.
-  base::Value* CreateValueForPref(const std::string& pref_name,
-                                  const std::string& controlling_pref_name);
+  virtual base::Value* CreateValueForPref(
+      const std::string& pref_name,
+      const std::string& controlling_pref_name);
 
   typedef std::multimap<std::string, std::string> PreferenceCallbackMap;
   PreferenceCallbackMap pref_callback_map_;
 
  private:
   // Type of preference value received from the page. This doesn't map 1:1 to
   // Value::Type, since a TYPE_STRING can require custom processing.
   enum PrefType {
     TYPE_BOOLEAN = 0,
     TYPE_INTEGER,
@@ skipping 69 matching lines @@
   typedef std::map<std::string, base::Callback<bool(const base::Value*)> >
       PrefChangeFilterMap;
   PrefChangeFilterMap pref_change_filters_;
 
   DISALLOW_COPY_AND_ASSIGN(CoreOptionsHandler);
 };
 
 }  // namespace options
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_CORE_OPTIONS_HANDLER_H_