Enable incognito_session_only preferences

chrome/browser/extensions/extension_pref_value_map.h

 // Copyright (c) 2011 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_EXTENSIONS_EXTENSION_PREF_VALUE_MAP_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PREF_VALUE_MAP_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 71 matching lines @@
 
   // Returns true if currently no extension with higher precedence controls the
   // preference.
   // Note that the this function does does not consider the existence of
   // policies. An extension is only really able to control a preference if
   // PrefService::Preference::IsExtensionModifiable() returns true as well.
   bool CanExtensionControlPref(const std::string& extension_id,
                                const std::string& pref_key,
                                bool incognito) const;
 
+  // Removes all "incognito session only" preference values.
+  void ClearAllIncognitoSessionOnlyPreferences();
+
   // Returns true if an extension identified by |extension_id| controls the
   // preference. This means this extension has set a preference value and no
   // other extension with higher precedence overrides it.
   // Note that the this function does does not consider the existence of
   // policies. An extension is only really able to control a preference if
   // PrefService::Preference::IsExtensionModifiable() returns true as well.
   bool DoesExtensionControlPref(const std::string& extension_id,
                                 const std::string& pref_key,
                                 bool incognito) const;
 
@@ skipping 57 matching lines @@
   // preferences values (i.e. the ones with the highest precedence)
   // are stored in ExtensionPrefStores.
   ExtensionEntryMap entries_;
 
   ObserverList<Observer, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefValueMap);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PREF_VALUE_MAP_H_