Use delegate protocols present in the 10.6 SDK

chrome/browser/cocoa/bookmark_editor_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.
 
 #ifndef CHROME_BROWSER_COCOA_BOOKMARK_EDITOR_CONTROLLER_H_
 #define CHROME_BROWSER_COCOA_BOOKMARK_EDITOR_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
+#import "base/cocoa_protocols_mac.h"
 #include "base/scoped_ptr.h"
 #include "base/scoped_nsobject.h"
 #include "chrome/browser/bookmarks/bookmark_editor.h"
 
 // A controller for the bookmark editor, opened with Edit... from the
 // context menu of a bookmark button.
-@interface BookmarkEditorController : NSWindowController {
+@interface BookmarkEditorController : NSWindowController<NSTextFieldDelegate> {
  @private
   IBOutlet NSTextField* nameField_;
   IBOutlet NSTextField* urlField_;
   IBOutlet NSBrowser* browser_;
   IBOutlet NSButton* okButton_;
   IBOutlet NSButton* newFolderButton_;
 
   NSWindow* parentWindow_;
   Profile* profile_;  // weak
   const BookmarkNode* parentNode_;  // weak; owned by the model
@@ skipping 23 matching lines @@
 
 @interface BookmarkEditorController(TestingAPI)
 @property (assign) NSString* displayName;
 @property (assign) NSString* displayURL;
 @property (readonly) BOOL okButtonEnabled;
 @end
 
 
 #endif  /* CHROME_BROWSER_COCOA_BOOKMARK_EDITOR_CONTROLLER_H_ */