Avoid conversion of index to BookmarkNode pointer unnacessarily.

chrome/browser/ui/cocoa/applescript/bookmark_folder_applescript.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/applescript/bookmark_folder_applescript.h"
 
 #import "base/mac/scoped_nsobject.h"
 #import "base/strings/string16.h"
 #include "base/strings/sys_string_conversions.h"
 #import "chrome/browser/ui/cocoa/applescript/bookmark_item_applescript.h"
@@ skipping 68 matching lines @@
   [aBookmarkFolder setBookmarkNode:node];
 }
 
 - (void)removeFromBookmarkFoldersAtIndex:(int)index {
   int position = [self calculatePositionOfBookmarkFolderAt:index];
 
   BookmarkModel* model = [self bookmarkModel];
   if (!model)
     return;
 
-  model->Remove(bookmarkNode_, position);
+  model->Remove(bookmarkNode_->GetChild(position));
 }
 
 - (NSArray*)bookmarkItems {
   NSMutableArray* bookmarkItems = [NSMutableArray
       arrayWithCapacity:bookmarkNode_->child_count()];
 
   for (int i = 0; i < bookmarkNode_->child_count(); ++i) {
     const BookmarkNode* node = bookmarkNode_->GetChild(i);
 
     if (!node->is_url())
@@ skipping 66 matching lines @@
   [aBookmarkItem setBookmarkNode:node];
 }
 
 - (void)removeFromBookmarkItemsAtIndex:(int)index {
   int position = [self calculatePositionOfBookmarkItemAt:index];
 
   BookmarkModel* model = [self bookmarkModel];
   if (!model)
     return;
 
-  model->Remove(bookmarkNode_, position);
+  model->Remove(bookmarkNode_->GetChild(position));
 }
 
 - (int)calculatePositionOfBookmarkFolderAt:(int)index {
   // Traverse through all the child nodes till the required node is found and
   // return its position.
   // AppleScript is 1-based therefore index is incremented by 1.
   ++index;
   int count = -1;
   while (index) {
     if (bookmarkNode_->GetChild(++count)->is_folder())
       --index;
   }
   return count;
 }
 
 - (int)calculatePositionOfBookmarkItemAt:(int)index {
   // Traverse through all the child nodes till the required node is found and
   // return its position.
   // AppleScript is 1-based therefore index is incremented by 1.
   ++index;
   int count = -1;
   while (index) {
     if (bookmarkNode_->GetChild(++count)->is_url())
       --index;
   }
   return count;
 }
 
 @end