Fix a bunch of clang warnings/errors.

chrome/browser/cocoa/applescript/bookmark_folder_applescript.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_APPLESCRIPT_BOOKMARK_FOLDER_APPLESCRIPT_H_
 #define CHROME_BROWSER_COCOA_APPLESCRIPT_BOOKMARK_FOLDER_APPLESCRIPT_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "chrome/browser/cocoa/applescript/bookmark_node_applescript.h"
 
+@class BookmarkItemAppleScript;
+
 // Represent a bookmark folder scriptable object in applescript.
 @interface BookmarkFolderAppleScript : BookmarkNodeAppleScript {
 
 }
 
 // Bookmark folder manipulation methods.
 // Returns an array of |BookmarkFolderAppleScript*| of all the bookmark folders
 // contained within this particular folder.
 - (NSArray*)bookmarkFolders;
 
 // Inserts a bookmark folder at the end.
 - (void)insertInBookmarkFolders:(id)aBookmarkFolder;
 
 // Inserts a bookmark folder at some position in the list.
 // Called by applescript which takes care of bounds checking, make sure of it
 // before calling directly.
 - (void)insertInBookmarkFolders:(id)aBookmarkFolder atIndex:(int)index;
 
 // Remove a bookmark folder from the list.
 // Called by applescript which takes care of bounds checking, make sure of it
 // before calling directly.
 - (void)removeFromBookmarkFoldersAtIndex:(int)index;
 
 // Bookmark item manipulation methods.
 // Returns an array of |BookmarkItemAppleScript*| of all the bookmark items
 // contained within this particular folder.
 - (NSArray*)bookmarkItems;
 
 // Inserts a bookmark item at the end.
-- (void)insertInBookmarkItems:(id)aBookmarkItem;
+- (void)insertInBookmarkItems:(BookmarkItemAppleScript*)aBookmarkItem;
 
 // Inserts a bookmark item at some position in the list.
 // Called by applescript which takes care of bounds checking, make sure of it
 // before calling directly.
-- (void)insertInBookmarkItems:(id)aBookmarkItem atIndex:(int)index;
+- (void)insertInBookmarkItems:(BookmarkItemAppleScript*)aBookmarkItem
+                      atIndex:(int)index;
 
 // Removes a bookmarks folder from the list.
 // Called by applescript which takes care of bounds checking, make sure of it
 // before calling directly.
 - (void)removeFromBookmarkItemsAtIndex:(int)index;
 
 // Returns the position of a bookmark folder within the current bookmark folder
 // which consists of bookmark folders as well as bookmark items.
 // AppleScript makes sure that there is a bookmark folder before calling this
 // method, make sure of that before calling directly.
 - (int)calculatePositionOfBookmarkFolderAt:(int)index;
 
 // Returns the position of a bookmark item within the current bookmark folder
 // which consists of bookmark folders as well as bookmark items.
 // AppleScript makes sure that there is a bookmark item before calling this
 // method, make sure of that before calling directly.
 - (int)calculatePositionOfBookmarkItemAt:(int)index;
 
 @end
 
 #endif  // CHROME_BROWSER_COCOA_APPLESCRIPT_BOOKMARK_FOLDER_APPLESCRIPT_H_