[Mac] Added (disabled) UI for extensions sync on OS X.

chrome/browser/cocoa/sync_customize_controller.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_COCOA_SYNC_CUSTOMIZE_CONTROLLER_H_
 #define CHROME_BROWSER_COCOA_SYNC_CUSTOMIZE_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/cocoa_protocols_mac.h"
@@ skipping 10 matching lines @@
   IBOutlet NSTextField* customizeSyncDescriptionTextField_;
 
   // The member variables below are connected to the dialog with KVO.
 
   // The registered flags indicate which model types are enabled for
   // syncing.
   BOOL bookmarksRegistered_;
   BOOL preferencesRegistered_;
   BOOL autofillRegistered_;
   BOOL themesRegistered_;
+  BOOL extensionsRegistered_;
 
   // The preferred flags indicate which model types the user would
   // like to sync.
   BOOL bookmarksPreferred_;
   BOOL preferencesPreferred_;
   BOOL autofillPreferred_;
   BOOL themesPreferred_;
+  BOOL extensionsPreferred_;
 }
 
 // syncService cannot be NULL.
 - (id)initWithProfileSyncService:(ProfileSyncService*)syncService;
 
 // Run as a sheet modal to the given window.
 - (void)runAsModalSheet:(NSWindow*)parentWindow;
 
 // End the sheet without saving the new preferred data types.
 - (IBAction)endSheetWithCancel:(id)sender;
 
 // Save the new preferred data types and end the sheet.
 - (IBAction)endSheetWithOK:(id)sender;
 
 // Properties for bindings.
 @property(assign) BOOL bookmarksRegistered;
 @property(assign) BOOL preferencesRegistered;
 @property(assign) BOOL autofillRegistered;
 @property(assign) BOOL themesRegistered;
+@property(assign) BOOL extensionsRegistered;
 
 @property(assign) BOOL bookmarksPreferred;
 @property(assign) BOOL preferencesPreferred;
 @property(assign) BOOL autofillPreferred;
 @property(assign) BOOL themesPreferred;
+@property(assign) BOOL extensionsPreferred;
 
 @property(readonly) BOOL okEnabled;
 
 @end
 
 #endif  // CHROME_BROWSER_COCOA_SYNC_CUSTOMIZE_CONTROLLER_H_