Make content settings map updates live.

chrome/browser/content_exceptions_table_model.h

 // Copyright (c) 2010 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_CONTENT_EXCEPTIONS_TABLE_MODEL_H_
 #define CHROME_BROWSER_CONTENT_EXCEPTIONS_TABLE_MODEL_H_
 
 #include <string>
 
 #include "app/table_model.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/content_settings_types.h"
+#include "chrome/common/notification_registrar.h"
+#include "chrome/common/notification_service.h"
 #include "chrome/browser/host_content_settings_map.h"
 
-class ContentExceptionsTableModel : public TableModel {
+class ContentExceptionsTableModel : public TableModel,
+                                    public NotificationObserver {
  public:
   ContentExceptionsTableModel(HostContentSettingsMap* map,
                               ContentSettingsType content_type);
 
   HostContentSettingsMap* map() const { return map_; }
   ContentSettingsType content_type() const { return content_type_; }
 
   const HostContentSettingsMap::HostSettingPair& entry_at(int index) {
     return entries_[index];
   }
 
   // Adds a new exception on the map and table model.
   void AddException(const std::string& host, ContentSetting setting);
 
   // Removes the exception at the specified index from both the map and model.
   void RemoveException(int row);
 
   // Removes all the exceptions from both the map and model.
   void RemoveAll();
 
   // Returns the index of the specified exception given a host, or -1 if there
   // is no exception for the specified host.
   int IndexOfExceptionByHost(const std::string& host);
 
   // TableModel overrides:
   virtual int RowCount();
   virtual std::wstring GetText(int row, int column_id);
   virtual void SetObserver(TableModelObserver* observer);
 
+  // NotificationObserver overrides:
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
  private:
   HostContentSettingsMap* map_;
   ContentSettingsType content_type_;
   HostContentSettingsMap::SettingsForOneType entries_;
   TableModelObserver* observer_;
+  NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentExceptionsTableModel);
 };
 
 #endif  // CHROME_BROWSER_CONTENT_EXCEPTIONS_TABLE_MODEL_H_