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diff --git a/chrome/browser/webui/options/content_settings_handler.h b/chrome/browser/webui/options/content_settings_handler.h
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+++ b/chrome/browser/webui/options/content_settings_handler.h
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+// 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_WEBUI_OPTIONS_CONTENT_SETTINGS_HANDLER_H_
+#define CHROME_BROWSER_WEBUI_OPTIONS_CONTENT_SETTINGS_HANDLER_H_
+#pragma once
+
+#include "chrome/browser/dom_ui/options/options_ui.h"
+#include "chrome/browser/plugin_data_remover_helper.h"
+#include "chrome/browser/prefs/pref_change_registrar.h"
+#include "chrome/common/content_settings_types.h"
+#include "chrome/common/notification_observer.h"
+#include "chrome/common/notification_registrar.h"
+
+class HostContentSettingsMap;
+
+class ContentSettingsHandler : public OptionsPageUIHandler {
+ public:
+  ContentSettingsHandler();
+  virtual ~ContentSettingsHandler();
+
+  // OptionsUIHandler implementation.
+  virtual void GetLocalizedValues(DictionaryValue* localized_strings);
+
+  virtual void Initialize();
+
+  virtual void RegisterMessages();
+
+  // NotificationObserver implementation.
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
+  // Gets a string identifier for the group name, for use in HTML.
+  static std::string ContentSettingsTypeToGroupName(ContentSettingsType type);
+
+ private:
+  // Functions that call into the page -----------------------------------------
+
+  // Updates the page with the default settings (allow, ask, block, etc.)
+  void UpdateSettingDefaultFromModel(ContentSettingsType type);
+  // Updates the state of the "Clear plugin LSO data on exit" checkbox.
+  void UpdateClearPluginLSOData();
+
+  // Clobbers and rebuilds the specific content setting type exceptions table.
+  void UpdateExceptionsViewFromModel(ContentSettingsType type);
+  // Clobbers and rebuilds all the exceptions tables in the page (both normal
+  // and OTR tables).
+  void UpdateAllExceptionsViewsFromModel();
+  // As above, but only OTR tables.
+  void UpdateAllOTRExceptionsViewsFromModel();
+  // Clobbers and rebuilds just the geolocation exception table.
+  void UpdateGeolocationExceptionsView();
+  // Clobbers and rebuilds just the desktop notification exception table.
+  void UpdateNotificationExceptionsView();
+  // Clobbers and rebuilds an exception table that's managed by the host content
+  // settings map.
+  void UpdateExceptionsViewFromHostContentSettingsMap(ContentSettingsType type);
+  // As above, but acts on the OTR table for the content setting type.
+  void UpdateExceptionsViewFromOTRHostContentSettingsMap(
+      ContentSettingsType type);
+
+  // Callbacks used by the page ------------------------------------------------
+
+  // Sets the default value for a specific content type. |args| includes the
+  // content type and a string describing the new default the user has
+  // chosen.
+  void SetContentFilter(const ListValue* args);
+
+  // Removes the given row from the table. The first entry in |args| is the
+  // content type, and the rest of the arguments depend on the content type
+  // to be removed.
+  void RemoveException(const ListValue* args);
+
+  // Changes the value of an exception. Called after the user is done editing an
+  // exception.
+  void SetException(const ListValue* args);
+
+  // Called to decide whether a given pattern is valid, or if it should be
+  // rejected. Called while the user is editing an exception pattern.
+  void CheckExceptionPatternValidity(const ListValue* args);
+
+  // Sets the global 3rd party cookies pref.
+  void SetAllowThirdPartyCookies(const ListValue* args);
+
+  // Utility functions ---------------------------------------------------------
+
+  // Gets the HostContentSettingsMap for the normal profile.
+  HostContentSettingsMap* GetContentSettingsMap();
+
+  // Gets the HostContentSettingsMap for the incognito profile, or NULL if there
+  // is no active incognito session.
+  HostContentSettingsMap* GetOTRContentSettingsMap();
+
+  // Gets the default setting in string form.
+  std::string GetSettingDefaultFromModel(ContentSettingsType type);
+
+  // Returns true if the default setting for the given content settings type
+  // |type| is managed.
+  bool GetDefaultSettingManagedFromModel(ContentSettingsType type);
+
+  // Member variables ---------------------------------------------------------
+
+  NotificationRegistrar notification_registrar_;
+  PrefChangeRegistrar pref_change_registrar_;
+  PluginDataRemoverHelper clear_plugin_lso_data_enabled_;
+
+  DISALLOW_COPY_AND_ASSIGN(ContentSettingsHandler);
+};
+
+#endif  // CHROME_BROWSER_WEBUI_OPTIONS_CONTENT_SETTINGS_HANDLER_H_