[Do not commit] Track revocations in content_settings::Observer

chrome/browser/ui/webui/options/content_settings_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_CONTENT_SETTINGS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS_CONTENT_SETTINGS_HANDLER_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 31 matching lines @@
   // OptionsPageUIHandler implementation.
   void GetLocalizedValues(base::DictionaryValue* localized_strings) override;
   void InitializeHandler() override;
   void InitializePage() override;
   void RegisterMessages() override;
 
   // content_settings::Observer implementation.
   void OnContentSettingChanged(const ContentSettingsPattern& primary_pattern,
                                const ContentSettingsPattern& secondary_pattern,
                                ContentSettingsType content_type,
+                               ContentSetting previous_value,
                                std::string resource_identifier) override;
 
   // content::NotificationObserver implementation.
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
   // PepperFlashSettingsManager::Client implementation.
   void OnGetPermissionSettingsCompleted(
       uint32_t request_id,
@@ skipping 229 matching lines @@
   scoped_ptr<content::HostZoomMap::Subscription>
       signin_host_zoom_map_subscription_;
   ScopedObserver<HostContentSettingsMap, content_settings::Observer> observer_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentSettingsHandler);
 };
 
 }  // namespace options
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_CONTENT_SETTINGS_HANDLER_H_