[Mac] Implement the search engine manager

chrome/browser/cocoa/preferences_window_controller.h

 // Copyright (c) 2009 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/scoped_ptr.h"
 #include "base/scoped_nsobject.h"
 #include "chrome/common/pref_member.h"
 
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 // Show the preferences window.
 - (void)showPreferences:(id)sender;
 
 // IBAction methods for responding to user actions.
 
 // Basics panel
 - (IBAction)makeDefaultBrowser:(id)sender;
 - (IBAction)addHomepage:(id)sender;
 - (IBAction)removeSelectedHomepages:(id)sender;
 - (IBAction)useCurrentPagesAsHomepage:(id)sender;
+- (IBAction)manageSearchEngines:(id)sender;
 
 // User Data panel
 - (IBAction)showSavedPasswords:(id)sender;
 - (IBAction)importData:(id)sender;
 - (IBAction)clearData:(id)sender;
 - (NSArray*)availableThemes;
 @property int currentTheme;
 - (IBAction)themesGallery:(id)sender;
 
 // Usable from cocoa bindings to hook up the custom home pages table.
 @property(readonly) CustomHomePagesModel* customPagesSource;
 
 // NSNotification sent when the prefs window is closed.
 extern NSString* const kUserDoneEditingPrefsNotification;
 
 @end